diff --git a/check_version_sync.py b/check_version_sync.py
index fddb9f6b..23c13b1b 100755
--- a/check_version_sync.py
+++ b/check_version_sync.py
@@ -1,8 +1,5 @@
 #! /usr/bin/env python3
-
-"""A script to check that the npm version string matches the python
-version string exactly.
-"""
+"""Check that the npm version string matches the Python version string exactly."""
 
 import json
 import tomllib
diff --git a/hardware-specific-tests/picamera2/test_acquisition.py b/hardware-specific-tests/picamera2/test_acquisition.py
index bb7d10ea..483c200f 100644
--- a/hardware-specific-tests/picamera2/test_acquisition.py
+++ b/hardware-specific-tests/picamera2/test_acquisition.py
@@ -32,8 +32,9 @@ def test_calibration(client):
 
 
 def test_jpeg_and_array(client):
-    """Check that grabbing a jpeg from the stream results in the same size
-    image as a array capture or a jpeg capture.
+    """Check that a jpeg grabbed from the stream is the same size as other captures.
+
+    Compare it to an array capture and a jpeg capture.
     """
     # Grab a jpeg from the stream
     blob = client.grab_jpeg()
diff --git a/hardware-specific-tests/picamera2/test_tuning.py b/hardware-specific-tests/picamera2/test_tuning.py
index 883aa017..5decd77b 100644
--- a/hardware-specific-tests/picamera2/test_tuning.py
+++ b/hardware-specific-tests/picamera2/test_tuning.py
@@ -46,7 +46,9 @@ def print_tuning(read_file: bool = False):
 
 
 def _test_bad_tuning_after_good_tuning(configure: bool = False):
-    """Load the default tuning file into the camera, re-load with a broken tuning file,
+    """Test loading good, bad, then another good tuning files in sequence.
+
+    Load the default tuning file into the camera, re-load with a broken tuning file,
     check it errors. Finally check the default tuning file will load again afterwards.
 
     :param configure: Boolean, set true to configure the camera on initial loading
diff --git a/pyproject.toml b/pyproject.toml
index c611e8e6..cb45e121 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -127,10 +127,9 @@ ignore = [
     "E501", # Ignore long lines for now
     "D203",  # incompatible with D204
     "D213",  # incompatible with D212
+    "D400",  # A stricter version of #415
     # Below are checkers to be turned on gradually
-    "D205", # Force single line summary!
     "D415",
-    "D400",
     "D200",
     # These should be turned on before this MR is complete
     "D100",
diff --git a/scripts/zenodo/zenodo.py b/scripts/zenodo/zenodo.py
index a0e3c9d3..c343ed6d 100644
--- a/scripts/zenodo/zenodo.py
+++ b/scripts/zenodo/zenodo.py
@@ -1,8 +1,9 @@
-"""Copyright (c) 2020 Bath Open Instrumentation Group
+"""A script for uploading to zenodo.
+
+Copyright (c) 2020 Bath Open Instrumentation Group
 Adapted from: https://gitlab.com/schlauch/zenodo-api-test/
 Copyright (c) 2018 German Aerospace Center (DLR). All rights reserved.
 SPDX-License-Identifier: MIT-DLR
-
 """
 
 import json
diff --git a/src/openflexure_microscope_server/logging.py b/src/openflexure_microscope_server/logging.py
index 352cf687..7ecdf0ac 100644
--- a/src/openflexure_microscope_server/logging.py
+++ b/src/openflexure_microscope_server/logging.py
@@ -68,9 +68,7 @@ def retrieve_log_from_file() -> PlainTextResponse:
 
 
 class OFMHandler(logging.Handler):
-    """A child class of logging.Handler. This class handles storing the most recent
-    logs for access by the server.
-    """
+    """A logging.Handler that stores the most recent logs for access by the server."""
 
     def __init__(self, level=logging.INFO, max_logs=250):
         super().__init__(level=level)
@@ -78,8 +76,11 @@ class OFMHandler(logging.Handler):
         self._max_logs = max_logs
 
     def append_record(self, record):
-        """Use the built in formatter to format the record, then save
-        it to an array. Pop any in excess of the maximum number of logs
+        """Format message and append it to a list of records.
+
+        The built in formatter is used to format the record.
+
+        Any records in excess of the maximum number of logs are removed.
         """
         self._log.append(self.format(record))
         while len(self._log) > self._max_logs:
diff --git a/src/openflexure_microscope_server/scan_directories.py b/src/openflexure_microscope_server/scan_directories.py
index 13b242a4..c8289bb2 100644
--- a/src/openflexure_microscope_server/scan_directories.py
+++ b/src/openflexure_microscope_server/scan_directories.py
@@ -224,8 +224,9 @@ class ScanDirectory:
 
     @property
     def images_dir(self) -> Optional[str]:
-        """The path to the images directory. None is returned if no images directory
-        was created
+        """The path to the images directory.
+
+        None is returned if no images directory was created.
         """
         im_path = os.path.join(self.dir_path, IMG_DIR_NAME)
         if os.path.isdir(im_path):
diff --git a/src/openflexure_microscope_server/scan_planners.py b/src/openflexure_microscope_server/scan_planners.py
index dc2dec71..8d159ad6 100644
--- a/src/openflexure_microscope_server/scan_planners.py
+++ b/src/openflexure_microscope_server/scan_planners.py
@@ -155,8 +155,7 @@ class ScanPlanner:
         return tuple(position) in self._remaining_locations
 
     def get_next_location_and_z_estimate(self) -> tuple[XYPos, Optional[int]]:
-        """Return the next location to scan, and the estimated z-position
-        for this location.
+        """Return the next location to scan and its estimated z-position.
 
         Note z-position may be None! This indicates that the current z, position
         should be used.
@@ -176,9 +175,12 @@ class ScanPlanner:
         return next_location, z
 
     def closest_focus_site(self, xy_pos: XYPos) -> Optional[XYZPos]:
-        """Return the xyz position of the closest site where focus was achieved
-        to the input xy_position, with the most recently taken image returned in
-        the case of a tie
+        """Return the xyz position of the closest site where focus was achieved.
+
+        The most recently taken image is returned in the case of a tie.
+
+        :param xy_pos: The xy_position which the returned position should be closest
+            to.
 
         Returns None if there if no focussed locations are present
         """
@@ -338,9 +340,10 @@ class SmartSpiral(ScanPlanner):
         self._remaining_locations.sort(key=sort_key)
 
     def get_next_location_and_z_estimate(self) -> tuple[XYPos, Optional[int]]:
-        """Return the next location to scan, and the estimated z-position
-        for this location. This overrides the default behaviour of ScanPlanner
-        to take the lowest value of nearest neighbours as this works best for smart stack
+        """Return the next location to scan and its estimated z-position.
+
+        This overrides the default behaviour of ScanPlanner to take the lowest value of
+        nearest neighbours as this works best for smart stack.
 
         Note z-position may be None! This indicates that the current z position
         should be used.
@@ -361,9 +364,11 @@ class SmartSpiral(ScanPlanner):
 
     def select_nearby_focus_site(self, xy_pos: XYPos) -> Optional[XYZPos]:
         """Return the xyz position of the nearby site with the lowest z position.
+
         Lowest position is best, as starting too high causes smart stacking to
         autofocus and restart. Starting too low just requires extra movements in +z.
-        Nearby is defined as within NEIGHBOUR_CUTOFF times the distance to the closest neighbour.
+        Nearby is defined as within NEIGHBOUR_CUTOFF times the distance to the closest
+        neighbour.
 
         Returns None if there if no focused locations are present
         """
@@ -397,12 +402,10 @@ class SmartSpiral(ScanPlanner):
         starting_pos: XYPos | np.ndarray,
         ending_pos: XYPos | np.ndarray,
     ) -> float:
-        """Return the number of moves between two xy positions in the x or y direction
-        whichever is largest
+        """Return the larger of x moves or y moves between two xy positions.
 
-        Args:
-        starting_pos: the position to measure from
-        ending_pos: the position to measure to
+        :param starting_pos: the position to measure from
+        :param ending_pos: the position to measure to
 
         """
         move_size = np.array([self._dx, self._dy])
diff --git a/src/openflexure_microscope_server/server/serve_static_files.py b/src/openflexure_microscope_server/server/serve_static_files.py
index c4e67bf4..9bffe511 100644
--- a/src/openflexure_microscope_server/server/serve_static_files.py
+++ b/src/openflexure_microscope_server/server/serve_static_files.py
@@ -9,7 +9,8 @@ THIS_DIR = os.path.dirname(os.path.abspath(__file__))
 
 
 def add_static_file(app: FastAPI, fname: str, folder: str) -> None:
-    """Add a single file to the root of the FastAPI app
+    """Add a single file to the root of the FastAPI app.
+
     The file  with name ``fname`` will be mounted at ``/fname`` - the
     ``folder`` does not affect where it is mounted in the app.
 
diff --git a/src/openflexure_microscope_server/things/autofocus.py b/src/openflexure_microscope_server/things/autofocus.py
index 216e47e5..177ba811 100644
--- a/src/openflexure_microscope_server/things/autofocus.py
+++ b/src/openflexure_microscope_server/things/autofocus.py
@@ -159,8 +159,7 @@ def _get_capture_by_id(captures: list[CaptureInfo], buffer_id: int) -> CaptureIn
 
 
 def _get_capture_index_by_id(captures: list[CaptureInfo], buffer_id: int) -> int:
-    """Return the index of the capture with the matching id from a list of CaptureInfo
-    objects
+    """Return the index of the capture with the matching id.
 
     :param captures: A list of capture objects
     :param buffer_id: The buffer id of the image to return
@@ -432,10 +431,13 @@ class AutofocusThing(lt.Thing):
         autofocus_dz: int,
         save_resolution: tuple[int, int],
     ) -> tuple[bool, int]:
-        """Run a smart stack, which captures images offset in z, testing
-        whether the sharpest image is towards the centre of the stack.
-        The sharpest image, and optionally images around the sharpest,
-        will be saved using their coordinates to images_dir
+        """Run a smart stack.
+
+        A smart stack captures images offset in z, testing whether the sharpest image
+        is towards the centre of the stack.
+
+        The sharpest image, and optionally images around the sharpest, will be saved
+        to the images_dir with their coordinates in the filename.
 
 
         :param cam: Camera Dependency supplied by LabThings dependency injection
@@ -506,15 +508,13 @@ class AutofocusThing(lt.Thing):
         stage: Stage,
         sharpness_monitor: SharpnessMonitorDep,
     ) -> None:
-        """Return to the initial height of the current stack, and run
-        a looping autofocus.
+        """Return to the initial z position and run a looping autofocus.
 
         :param initial_z_pos: The initial z positions of previous captures
         :param  autofocus_dz: the range in steps to autofocus
 
         ``stage`` and ``sharpness_monitor`` are Thing dependencies passed through
-        from the calling action
-
+        from the calling action.
         """
         stage.move_absolute(z=initial_z_pos)
         self.looping_autofocus(
@@ -530,8 +530,10 @@ class AutofocusThing(lt.Thing):
         stack_parameters: StackParams,
         cam: WrappedCamera,
     ) -> int:
-        """Save the required captures to disk. Will save the sharpest image,
-        and any images either side of focus.
+        """Save the required captures to disk.
+
+        This will save the sharpest image, and optionally extra images either
+        side of focus (see ``stack_parameters.images_to_save``).
 
         :param sharpest_id: the buffer id index of the sharpest image
         :param captures: a list of captures, including file name, image data and
@@ -559,8 +561,12 @@ class AutofocusThing(lt.Thing):
         cam: WrappedCamera,
         stage: Stage,
     ) -> tuple[bool, list[CaptureInfo], Optional[int]]:
-        """Capture a series of images offset by stack_parameters.stack_dz, and test whether
-        the sharpest image is towards the centre of the stack.
+        """Capture a series of images checking that sharpest image central
+
+        The images are seperated in z offset by stack_parameters.stack_dz, as they
+        are captured the last stack_parameters.min_images_to_test images are checked
+        to see if the sharpest image is central enough in the stack. If it is the stack
+        completes.
 
         :param stack_parameters: a StackParams object holding stack parameters
         :param cam: Camera Dependency to be passed through from the calling action
@@ -644,8 +650,7 @@ class AutofocusThing(lt.Thing):
     def check_stack_result(
         self, captures: list[CaptureInfo]
     ) -> tuple[Literal["success", "continue", "restart"], int]:
-        """Test a list of captures, to decide whether the sharpest image from a
-        stack is centrally enough in the stack
+        """Check if the sharpest image in a list of captures is central enough.
 
         :param captures: a list of the capture objects to for testing if the
             sharpness has converged in the centre
diff --git a/src/openflexure_microscope_server/things/camera/__init__.py b/src/openflexure_microscope_server/things/camera/__init__.py
index 1a4c105f..805c6d47 100644
--- a/src/openflexure_microscope_server/things/camera/__init__.py
+++ b/src/openflexure_microscope_server/things/camera/__init__.py
@@ -156,8 +156,10 @@ class BaseCamera(lt.Thing):
     def start_streaming(
         self, main_resolution: tuple[int, int], buffer_count: int
     ) -> None:
-        """Start (or stop and restart) the camera with the given resolution
-        for the main stream, and buffer_count number of images in the buffer
+        """Start (or stop and restart) the camera.
+
+        :param main_resolution: the resolution to use for the main stream.
+        :param buffer_count: number of images in the stream buffer.
         """
         raise NotImplementedError(
             "CameraThings must define their own start_streaming method"
@@ -342,12 +344,14 @@ class BaseCamera(lt.Thing):
         metadata_getter: lt.deps.GetThingStates,
         logger: lt.deps.InvocationLogger,
     ) -> Image:
-        """Capture an image in memory and return it with metadata
-        CaptureError raised if the capture fails for any reason
-        returns tuple with PIL Image, and dict of metadata.
+        """Capture an image in memory and return it with metadata.
 
         This robust capturing method attempts to capture the image five times
         each time with a 5 second timeout set.
+
+        :raises CaptureError: if the capture fails for any reason
+
+        :returns: tuple with PIL Image, and dictionary of metadata.
         """
         for capture_attempts in range(5):
             try:
diff --git a/src/openflexure_microscope_server/things/camera/picamera.py b/src/openflexure_microscope_server/things/camera/picamera.py
index d045d562..dfb293e5 100644
--- a/src/openflexure_microscope_server/things/camera/picamera.py
+++ b/src/openflexure_microscope_server/things/camera/picamera.py
@@ -62,8 +62,9 @@ class PicameraStreamOutput(Output):
 
 
 class SensorMode(BaseModel):
-    """A Pydantic model holding all the information about a specific
-    sensor mode as reported by the PiCamera.
+    """A Pydantic model holding all the information about a specific sensor mode.
+
+    This data is as reported by the PiCamera2 module.
     """
 
     unpacked: str
@@ -76,10 +77,11 @@ class SensorMode(BaseModel):
 
 
 class SensorModeSelector(BaseModel):
-    """A Pydantic model holding the two values needed to select a PiCamera
-    Sensor mode. The output size and the bit depth.
+    """A Pydantic model holding the two values needed to select a PiCamera Sensor mode.
 
-    This is a Pydantic modell so that it can be saved to the disk.
+    Theses values are the output size and the bit depth.
+
+    This is a Pydantic model so that it can be saved to disk.
     """
 
     output_size: tuple[int, int]
diff --git a/src/openflexure_microscope_server/things/camera/picamera_recalibrate_utils.py b/src/openflexure_microscope_server/things/camera/picamera_recalibrate_utils.py
index 2edbecb9..33f5d4ab 100644
--- a/src/openflexure_microscope_server/things/camera/picamera_recalibrate_utils.py
+++ b/src/openflexure_microscope_server/things/camera/picamera_recalibrate_utils.py
@@ -477,12 +477,16 @@ def set_static_geq(
     tuning: dict,
     offset: int = 65535,
 ) -> None:
-    """Update the ``rpi.geq`` section of a camera tuning dict to always use green
-    equalisation that averages the green pixels in the red and blue rows.
+    """Update the ``rpi.geq`` section of a camera tuning dict.
 
-    ``tuning`` will be updated in-place to set the geq offest to the given value.
-    The default 65535 is the maximum allowed value. This means
-    the brightness will always be below the threshold where averaging is used.
+    :param tuning: the raspberry pi tuning file. This will be updated in-place to
+        set the geq offest to the given value.
+    :param offset: The desired green equalisation offset. Default 65535. The default is
+        the maximum allowed value. This means the brightness will always be below the
+        threshold where averaging is used. This is default as we always need the green
+        equalisation to averages the green pixels in the red and blue rows due to the
+        chief ray angle compensation issue when the the stock lens is replaced by an
+        objective.
     """
     geq = Picamera2.find_tuning_algo(tuning, "rpi.geq")
     geq["offset"] = offset  # max out offset to disable the adaptive green equalisation
diff --git a/src/openflexure_microscope_server/things/smart_scan.py b/src/openflexure_microscope_server/things/smart_scan.py
index 13383bdb..0c5cfeb8 100644
--- a/src/openflexure_microscope_server/things/smart_scan.py
+++ b/src/openflexure_microscope_server/things/smart_scan.py
@@ -311,8 +311,9 @@ class SmartScanThing(lt.Thing):
 
     @_scan_running
     def _save_scan_inputs_json(self):
-        """Save scan inputs as a JSON file in the scan folder, to allow
-        the user to review the settings used in the scan
+        """Save scan inputs as a JSON file in the scan folder.
+
+        This file allows the user to review the settings used in the scan.
         """
         # Should this be a method of the scan_data dataclass?
 
@@ -335,11 +336,10 @@ class SmartScanThing(lt.Thing):
 
     @_scan_running
     def _update_scan_data_json(self, scan_result: str):
-        """Update scan data as a JSON file in the scan folder, with
-        data only known at the end of the scan.
+        """Update scan data JSON file with data only known at the end of the scan.
 
-        Takes scan_result, a string that is either "success",
-        "cancelled by user", or the error that ended the scan.
+        Takes scan_result, a string that is either "success", "cancelled by user",
+        or the error that ended the scan.
         """
         # Should this be a method of the scan_data dataclass?
         current_time = datetime.now().replace(microsecond=0)
@@ -378,10 +378,11 @@ class SmartScanThing(lt.Thing):
 
     @_scan_running
     def _run_scan(self):
-        """Prepare and run the main scan, handling the threads performing
-        stitching. Uses the result (or exception) from the scanning to
-        determine whether the scan should be stitched and the microscope
-        should return to the starting x,y,z position
+        """Prepare and run the main scan, and perform final actions on completion.
+
+        The result (or exception) from the main scan loop determines whether the
+        scan should be stitched and whether  the microscope should return to the
+        starting x,y,z position.
         """
         # Used to check if finally was reached via exception (except
         # cancel by user)
@@ -765,8 +766,7 @@ class SmartScanThing(lt.Thing):
 
     @_scan_running
     def _preview_stitch_start(self, overlap: float) -> None:
-        """Start stitching a preview of the scan in a background subprocess
-
+        """Start stitching a preview of the scan in a background subprocess.
 
         This uses popen and returns immediately
 
@@ -954,8 +954,9 @@ class SmartScanThing(lt.Thing):
         self,
         scan_name: str,
     ):
-        """Update the zip to include the files left until the end, then return the
-        zip file as a Blob
+        """Return zip after including any files left until the end.
+
+        The zipfile is returned as a Blob.
         """
         zip_fname = self._scan_dir_manager.zip_scan(scan_name, final_version=True)
         return ZipBlob.from_file(zip_fname)
diff --git a/src/openflexure_microscope_server/utilities.py b/src/openflexure_microscope_server/utilities.py
index ceee622a..82175431 100644
--- a/src/openflexure_microscope_server/utilities.py
+++ b/src/openflexure_microscope_server/utilities.py
@@ -43,8 +43,10 @@ class ErrorCapturingThread(Thread):
         )
 
     def join(self, timeout=None):
-        """Join when the thread is complete. If the thread ended due to an unhandled exception,
-        the exception will be raised when this method is called.
+        """Join when the thread is complete.
+
+        If the thread ended due to an unhandled exception, the exception will be raised
+        when this method is called.
         """
         super().join(timeout)
         # If there is an error in the error buffer clear the buffer and raise it
diff --git a/tests/test_scan_directories.py b/tests/test_scan_directories.py
index 0a79476d..27d613b5 100644
--- a/tests/test_scan_directories.py
+++ b/tests/test_scan_directories.py
@@ -183,9 +183,7 @@ def test_scan_sequence_and_listing():
 
 
 def test_scan_name_non_sequential():
-    """Check created scans is the correct name if the directories
-    are not sequential
-    """
+    """Check new scan has the correct name if the directories are not sequential"""
     _clear_scan_dir()
     os.makedirs(os.path.join(BASE_SCAN_DIR, "fake_scan_0001"))
     os.makedirs(os.path.join(BASE_SCAN_DIR, "fake_scan_0002"))
diff --git a/tests/test_scan_planners.py b/tests/test_scan_planners.py
index fe057bed..4980cae4 100644
--- a/tests/test_scan_planners.py
+++ b/tests/test_scan_planners.py
@@ -222,8 +222,10 @@ def test_mark_wrong_location():
 
 
 def test_closest_focus_wth_large_numbers():
-    """The number of steps gets very large in reality runs some tests to check
-    that everything works well with huge numbers of steps
+    """Tests to check that everything works well with huge numbers of steps.
+
+    The number of steps gets very large on the micorscope. But most of the tests
+    above use smaller numbers for clarity.
     """
     intial_position = (0, 0)
     # Set this up, but we won't use the settings
@@ -247,11 +249,18 @@ def test_closest_focus_wth_large_numbers():
 
 
 def test_example_smart_spiral():
-    """Test the smart spiral scan algorithm on the sample types listed
-    below and defined in scan_test_helpers.load_sample_points
+    """Test the smart spiral scan algorithm on the different sample types.
 
-    Will fail if the locations or path between locations visited has changed
-    for any of the samples listed
+    The sample types:
+
+    * ``regular``
+    * ``lobed``
+    * ``core"``
+
+    These are defined in scan_test_helpers.load_sample_points
+
+    This will fail if the locations or path between locations visited has changed
+    for any of the samples listed.
     """
     example_samples = [
         "regular",
diff --git a/tests/test_smart_scan.py b/tests/test_smart_scan.py
index b35ec008..9ff2d0cb 100644
--- a/tests/test_smart_scan.py
+++ b/tests/test_smart_scan.py
@@ -63,8 +63,10 @@ def test_initial_properties(smart_scan_thing):
 
 
 def test_inaccessible_scan_methods(smart_scan_thing):
-    """The @_scan_running decorator should make some methods
-    inaccessible unless a scan is running
+    """Test that method with @_scan_running decorator is inaccessible.
+
+    The @_scan_running decorator makes these functions inacessible unless
+    a scan is running.
     """
     with pytest.raises(ScanNotRunningError):
         smart_scan_thing._run_scan()
diff --git a/tests/test_stack.py b/tests/test_stack.py
index f1fb5e9a..7420fc17 100644
--- a/tests/test_stack.py
+++ b/tests/test_stack.py
@@ -46,7 +46,7 @@ def even_integers(min_value=0, max_value=1000):
     extra_ims=even_integers(min_value=0, max_value=10),
 )
 def test_stack_params_validation(save_ims, extra_ims):
-    """Tests specifically the validation on the image numbers
+    """Test the validation of the image numbers for a stack.
 
     save_ims is the number to save (must be odd and positive)
     extra_ims is how many more images there are in min_images_to_test than
@@ -68,8 +68,9 @@ def test_stack_params_validation(save_ims, extra_ims):
     extra_ims=even_integers(min_value=-10, max_value=-1),
 )
 def test_stack_params_not_enough_test_images(save_ims, extra_ims):
-    """Set the extra_ims negative so that min_images_to_test is smaller
-    than images_to_save.
+    """Test error is raised if min_images_to_test is smaller than images_to_save.
+
+    ``extra_ims`` negative so that min_images_to_test is smaller than images_to_save.
 
     For arguments see test_stack_params_validation
     """
diff --git a/tests/utilities/scan_test_helpers.py b/tests/utilities/scan_test_helpers.py
index 54086255..9bb40423 100644
--- a/tests/utilities/scan_test_helpers.py
+++ b/tests/utilities/scan_test_helpers.py
@@ -14,23 +14,23 @@ THIS_DIR = os.path.dirname(os.path.realpath(__file__))
 
 
 class FakeSample:
-    """A fake sample to test scan algorithms. The sample is able to return
-    whether a given position is sample, no image associated with the sample
+    """A fake sample to test scan algorithms.
+
+    The sample is able to return whether a given position is sample, there is no image
+    associated with the sample
     """
 
     def __init__(self, xy_points: list[tuple[int, int]]):
-        """Create the sample from a spline interpolation around
-        the given points.
-        """
+        """Create the sample from a spline interpolation around the given points."""
         self._sample_perimeter = interp_closed_path(xy_points, 500)
 
     def is_sample(self, pos: tuple[int, int], im_size: tuple[int, int]) -> bool:
-        """Return whether an image at a given location with a given image size
-        is on the sample
+        """Return True if an image at a given location is on the sample.
 
-        This doesn't check the entire image field as this is designed to be used
-        where the fake sample is much larger than the image and has smooth edges
-        It just checks the 4 corners
+        The image size is specified to check if it overlaps the sample. It doesn't
+        check the entire image field as this is designed to be used where the fake
+        sample is much larger than the image and has smooth edges. It just checks the
+        4 corners.
         """
         img_corners = [
             (pos[0] + im_size[0], pos[1] + im_size[1]),
@@ -77,8 +77,9 @@ def visualise_scan(sample: FakeSample, planner: scan_planners.ScanPlanner) -> Fi
 
 
 def interp_closed_path(xy_points: list[tuple[int, int]], n_points: int) -> MatPath:
-    """Given a lists of xy_points interpolate an n_point closed curve. This can be used
-    to create an arbitrary sample shape plan a scan.
+    """Interpolate an n_point closed curve from a lists of xy_points.
+
+    This can be used to create an arbitrary sample shape for testing a scan planner.
 
     Modified from:
     https://stackoverflow.com/questions/33962717/interpolating-a-closed-curve-using-scipy
@@ -105,8 +106,9 @@ def interp_closed_path(xy_points: list[tuple[int, int]], n_points: int) -> MatPa
 def example_smart_spiral(
     sample_name: str = "lobed",
 ) -> tuple[FakeSample, scan_planners.ScanPlanner]:
-    """Run an example scan and return the sample scanned and the planner object
-    after scan is complete
+    """Run an example scan.
+
+    :returns: The sample scanned and the planner object after scan is complete.
     """
     xy_sample_points = load_sample_points(sample_name)
     sample = FakeSample(xy_sample_points)
@@ -126,11 +128,11 @@ def example_smart_spiral(
 
 
 def profile_and_save_plot_for_example_smart_spiral():
-    """Run the example scan and save a plot and the profile data
-    Also print the cumulative stats
+    """Run the example scan and save a plot and the profile data.
 
+    Also print the cumulative stats.
 
-    This runs if you run this file directly
+    This runs if you run this file directly.
     """
     import pstats
     import cProfile
@@ -152,8 +154,9 @@ def profile_and_save_plot_for_example_smart_spiral():
 
 
 def update_example_smart_spiral_pickle(sample_name: str):
-    """Pickle the ScanPlanner for the example_smart_spiral(),
-    this is done so the history can be compared by testing to check
+    """Pickle the ScanPlanner for the example_smart_spiral().
+
+    This is done so the history can be compared by testing to check
     the algorithm is unchanged.
 
     If the algorithm is purposefully changed then this will need to be
@@ -171,8 +174,9 @@ def update_example_smart_spiral_pickle(sample_name: str):
 def get_expected_result_for_example_smart_spiral(
     sample_name: str,
 ) -> scan_planners.ScanPlanner:
-    """Return the expected ScanPlanner object for the example_smart_spiral(),
-    this is pickled, so that it can be committed.
+    """Return the expected ScanPlanner object for the example_smart_spiral().
+
+    This is loaded from a pickle so that the object can be committed to the repo.
     """
     pkl_fname = os.path.join(THIS_DIR, f"example_smart_spiral_{sample_name}.pkl")
     with open(pkl_fname, "rb") as pkl_file_obj: