Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already flag destructive=true, idempotent=false, readOnly=false, so the safety profile is covered. The description still adds real value beyond that: the required permission scope, the fact that the provider-side token is not revoked, and the deleted=false no-op return. It stops short of full detail (e.g. no mention of partial-failure behavior), so a 4 rather than 5.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.