Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already convey read-only, idempotent, and non-destructive behavior, lowering the burden. The description adds the endpoint and a single-fbId scope, which is useful but does not enrich behavioral understanding further (e.g., pagination, limits, or error semantics). No contradiction with annotations.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.