Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations, the description must disclose behavior. It mentions the data source (FBI Crime Data Explorer) and return type (annual crime estimate data), indicating a read-only operation. It lacks details on edge cases or data availability, but the provided context is solid for a query tool.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.