Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already declare destructiveHint=true and readOnlyHint=false, so the safety profile is covered. The description usefully adds the consequence that the secret 'can no longer be used,' but it says nothing about irreversibility, whether revocation can be undone, or that repeated revokes may error (idempotentHint=false).
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.