Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
The annotations already declare destructiveHint=true and idempotentHint=true, so the safety profile is mostly given. The description still adds real value: by saying '本连接器保存的', it narrows the destructive effect to this connector's stored credentials and shows that the logout is not account-wide, which is context the annotations cannot express. It does not explain what token or cookie storage is removed or whether the user can recover the session.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.