I see the reason for delegating some of the keywords to the underlying `call_vo_service`, but as a user this is frustrating.  From ipython doing `help conesearch` won't give enough information directly to use `conesearch`.  It also depends somewhat on the understanding that `call_vo_service` is being called.

As a user I would prefer that all the keywords that control `conesearch` be included in the function definition and documented accordingly, even if they are just passed through to `call_vo_service`.