"Too Simple" is something which has been discussed on Stack Exchange before, and was implemented on other sites with a General Reference close reason. It was considered a failure though, since all it results in is users drawing arbitrary lines in the sand for when a question is "too simple", and what sites are considered general reference.
Furthermore, a tool already exists for questions which are too simple, it's called a downvote.
This question does not show any research effort; it is unclear or not useful (click again to undo)
As you can see, the case of a question which is too simple is covered by
does not show any research effort. With this in mind, there's really no reason to close these questions as well, because down votes are already a sufficient way of dealing with them.