Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already establish that this is a read-only, idempotent, non-destructive, closed-world lookup. The description adds useful behavioral context by listing the categories of information returned and explicitly warning that it does not establish clinical suitability or current licensure.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.