Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations present, the description carries the full disclosure burden, and it does contribute one genuinely useful behavioral fact: the call requires the `users:manage` permission. However it says nothing about pagination, result volume, ordering, or what a returned agent contains, so the behavioral picture remains thin for a list endpoint.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.