Does an arm in Moveit require an end effector

I am developing a robot arm on Indigo that just has a camera on the end of it. Since the camera is on the last link of the arm and the position of the end of the arm i was wondering if I still need to include an "end effector" in the URDF description? If not what would the description of a end effector that does not do anything look like? What would the controller for such a thing be? thanks