Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations include readOnlyHint=true, which already indicates a safe read operation. The description adds that it returns a greeting to confirm the server is running, but does not mention any rate limits, authentication, or error behavior. This is adequate given the annotation coverage.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.