Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
No annotations exist, so the description must fully convey behavioral traits. It states 'delete' implying destruction but omits consequences like cascading deletes, permission requirements, reversibility, or error conditions (e.g., if subscription does not exist). This is insufficient 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.