Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
The description states the tool is 'Read-only and free,' which adds value beyond the readOnlyHint annotation by also noting cost implications. It mentions passing an ideaId 'you own,' implying authorization requirements. There is no contradiction with annotations.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.