Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already declare readOnlyHint=true and destructiveHint=false, and the description reinforces this by saying 'without modifying it'. It adds extra behavioral context by disclosing limitations (no citable item permalinks, no Company Knowledge fetch support), which goes beyond the safety annotations.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.