Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations provided, the description carries the full burden. It discloses the cascading deletion of the linked Credentials record, which is valuable, but it does not state that the action is irreversible, mention permission requirements, or describe what happens to bindings/deployments associated with the key.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.