Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already declare readOnlyHint=true, and the description adds valuable context: it requires an admin API key, returns specific per-regulation analysis fields, and has no parameters. This goes beyond the annotations and describes the tool's behavior and output structure.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.