Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
No annotations are provided, so the description carries the full burden. It discloses exact scoring threshold, the ET trading window, the level requirement, and the fallback to latest alert when alert_json is omitted. It doesn't state read-only or error behavior, but 'check' implies a non-mutating operation and the presence of an output schema covers return shape.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.