Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations, the description carries the full burden. It clearly states the destructive nature ('Permanently delete', 'cannot be undone'), which is critical behavioral transparency. However, it omits potential side effects like cascading deactivations or authentication requirements, but for a simple delete operation this is acceptable.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.