Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations, the description carries the full burden. It discloses permanence ('permanently delete') and the requirement that the intent be unsubmitted, which are important safety traits. However, it does not disclose potential cascading effects on attachments, permissions required, or success/failure behavior, leaving some gaps for a destructive operation.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.