Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
The annotations already establish read-only, idempotent, closed-world, and non-destructive behavior. The description adds useful behavioral context beyond that by noting that results are paged and that each maker includes place, active years, mark count, and an example mark image.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.