Answer:
I'm a ruler with 12 agents. Half of them work in the darkness. Who am I?
My first though water cures no thirst my next alone has soul and when he lives upon my first he then is called my whole.
My first is high my second damp my whole a tie a writer's cramp.
Although it sounds like I work on a transportation device I actually work in a restaurant.
I come off of a beautiful creature which soars in the sky. I come off of a peckish creature which has a tail as mighty as the sun! I am sometimes dirty and parents beg you not to pick me up.
It has no top or bottom, but it can hold flesh, bones, and blood all at the same time.