Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations the description carries the full burden, and it does disclose ordering, the max-2000 row cap, the default-500 coverage warning ('only a few minutes of a busy hour'), and the side=long sign convention. It does not cover auth requirements, rate limits, or what happens at the 2000-row boundary, so it falls short of complete behavioral disclosure.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.