Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already declare readOnlyHint, idempotentHint, and destructiveHint. The description adds context about premium-quality geocoding and highest accuracy for US addresses, which goes beyond the annotations. It does not mention rate limits or error conditions, but the core behavioral traits are well-covered.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.