Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already declare readOnlyHint:true, destructiveHint:false, and idempotentHint:true. The description reinforces these by stating it is read-only and cannot charge, and adds that the search is over 'verified' content. This adds value beyond annotations, though it could include additional behavioral details (e.g., pagination behavior, result format).
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.