Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already declare readOnlyHint=true and destructiveHint=false, so the description does not need to repeat safety. It adds the behavioral fact that the search spans two sources simultaneously, which is useful context. However, it does not disclose details like result merging, pagination, or any side effects, but given the annotations cover the safety profile, a mid score is appropriate.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.