Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already declare this is a non-destructive, closed-world mutation, so the bar is lower. The description adds genuinely useful side-effect context: content is preserved but credentials are NOT restored, which is exactly the kind of irreversible detail an agent must know before calling. It omits idempotency/error behavior if the spec is already active, keeping it short of a 5.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.