Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
The annotations already indicate readOnlyHint=true, openWorldHint=false, idempotentHint=true, and destructiveHint=false, making the safe, non-mutating nature explicit. The description adds behavioral details about the return format (ranked matches with canonical URLs and freshness), which goes beyond the annotations. However, it does not mention pagination or other response details, but that is not a significant omission given the annotations.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.