Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already declare this is a non-read-only, non-idempotent, non-destructive mutation, and the description adds the role/permission requirement. It does not disclose what happens when ownerLabel is null, whether both fields can be updated together, or what success/failure responses look like, but the simple update nature and annotation coverage keep the gap moderate.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.