Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
The annotations already establish read-only, closed-world, non-destructive behavior. The description adds useful behavioral context by disclosing the assembled categories and framing the tool as context-only. It does not mention permissions, rate limits, or response format, but that is less critical given the existing output schema and annotations.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.