Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already declare readOnlyHint=true and destructiveHint=false. The description adds that results are per-recipient and include opens, plays, downloads, and feedback, but it does not disclose details such as pagination, time-window limits, or empty-result semantics. This is acceptable given the output schema exists.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.