Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations, the description carries the full burden. It states 'permanently delete' and 'irreversible', which covers destructive behavior, but omits details like required permissions, whether the workspace must be empty, or if confirmation is needed.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.