Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already mark the tool as readOnly, idempotent, and openWorld. The description adds value by detailing data sources (NVD, OpenCVE, AWS pricing) and outputs (ranked order, risk scores, cloud impact), providing behavioral context beyond the annotations.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.