Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already declare idempotentHint=true and destructiveHint=false. The description adds the default status behavior ('defaults to done'), but does not disclose other behavioral traits like error handling or permission requirements, which is adequate for a simple update tool.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.