Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already declare readOnlyHint=true, and the description aligns with that. The description adds value by specifying the exact content returned ('intent and trigger phrases'), which provides behavioral/return details beyond the annotation. It does not mention openWorldHint semantics, but that is not a contradiction.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.