Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With readOnlyHint and openWorldHint already present, the description adds value by disclosing the output structure—each category includes a description and medication count. It does not mention pagination or rate limits, but for a simple listing tool the provided context is sufficient beyond annotations.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.