Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
No annotations are present, so the description should disclose mutation behavior. It merely states 'update' without explaining partial update semantics, idempotency, permission requirements, or return values. The optional label parameter suggests partial update, but this is not stated.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.