Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations, the description carries the full burden. "Discard" suggests a destructive, likely irreversible mutation, but the description never states whether rejected requests can be requeued, what happens to in-flight or partial work, whether errors occur for unknown/already-decided IDs, or whether special permissions are required.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.