You also only need one space on the next line for Sphinx/RST to detect a continuation, it will make it easier to document larger things. Also, both ```class``` and ```func``` are decorators, so I am not 100% sure what you are trying to define.
So in this example:
```
:param taskqueue_service: The Task queue service stub used by this
 function. (I think?)
:type taskqueue_service:
 :class:`~google.appengine.api.taskqueue.taskqueue_stub.TaskQueueServiceStub`
:param queue_name: Name of the Queue to fetch tasks from.
:type queue_name: str
:param non_furious_url_prefixes: List of url prefixes that the
 furious task runner will run.
:type non_furious_url_prefixes: list
:param non_furious_handler: Function handler for non-furious tasks to
 run within.
:param enable_retries: Flag for if retries are enabled or not. Defaults
 to False.
:type enable_retries: bool
:returns: The number of tasks processed.
:rtype: int
```
This might be one of the few times I would avoid a type on the non-furious handler, since I am unsure of a Pycharm-introspection type for "Insert generic function here". Built in python elements don't need the ```:class:``` decorator, just external libraries and ones we make. Also try to keep the whole path in there, as it will do a better job finding them and wont break your docstrings/documentation if you rename an import with an 'as' statement.