Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
The description discloses that the tool calls the LLM, incurs token costs, and is not read-only, which goes beyond the annotations (readOnlyHint false, idempotentHint true). It also adds an admin-only permission requirement, providing valuable behavioral context.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.