Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already declare readOnly, idempotent and non-destructive, but the description adds real context: the ordering guarantee, the queue lifecycle (an item disappears after the extension attempts it), and the authentication requirement. It does not cover pagination or what happens when the queue is empty, but the added value is clear.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.