"depends on the agency, the location, and the vehicle." That explains it best. I asked once if the officed had a wrench in his truck as the idler puller bolt I forgotten to tighten backed out and threw my fan belt off. He dug though a messy truck and couldn't find oue so I ended up tightening it every few miles with a no name multi tool.
Don't count on them having anything you might need because when you need it they probably won't have it.
Thats why we carry all our stuff. I made a small toolkit for my truck after that. I bought a "wrench roll" which is a piece of fabric with a bunch of pockets sewn into it and filled it with tools I could get on sale at sears and keep it behind the seat among the rest of my gear.