Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already mark readOnlyHint=true, but the description adds meaningful behavioral context: responses are unread, ordered oldest-first, and reading does not acknowledge them. The note that acknowledge_feedback_responses must be called separately prevents a common misuse, going well beyond structured annotation data.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.