Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already declare read-only, idempotent, non-destructive behavior. The description adds that the result includes profile, notes, summary, and timeline context, which is useful, but it does not disclose additional behavioral aspects such as authorization requirements or error cases. It does not contradict the annotations.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.