More helpful docstring for ActionView.get

Author: rwb27

src/labthings/views/__init__.py

@@ -171,7 +171,12 @@ def __init_subclass__(cls):
     @classmethod
     def get(cls):
         """
-        Default method for GET requests. Returns the action queue (including already finished actions) for this action
+        List running and completed actions.
+
+        Actions are run with `POST` requests.  See the `POST` method for this URL for 
+        details of the action.  Sending a `GET` request to an action endpoint will return
+        action descriptions for each time the action has been run, including whether they
+        have completed, and any return values.
         """
         queue_schema = build_action_schema(cls.schema, cls.args)(many=True)
         return queue_schema.dump(cls._deque)