[grey-area]

I think the reason people limit verbs (or nouns) usually comes down to attempting to limit the gestalt which others coming new to the system have to hold in their head - if I know that you serve n resources, each of which has 4 well understood verbs, it's much easier to reason about than if I must know the verbs which go with each object and what they do to that particular object in your world.

Of course the real world and real systems will never conform to this sort of system, and you have to break out of it occasionally, but sometimes it's a good starting point as long as you're don't let it limit the horizons of your world, such that only 4 verbs should be enough for anyone, or verbs become completely subsidiary to nouns and must be escorted by them at all times. Zealotry based on this perfectly reasonable idea (limiting complexity to promote understanding) often leads to a Kingdom of Nouns situation:

http://steve-yegge.blogspot.co.uk/2006/03/execution-in-kingd...