Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already declare readOnlyHint, idempotentHint, and non-destructive, so the safety profile is covered. The description does add a useful scope fact — rows include done and dismissed tasks, not just open ones. It says nothing about pagination, result size, or ordering semantics beyond 'by who acts next'.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.