Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already provide readOnlyHint=true, destructiveHint=false, and idempotentHint=true, covering the safety profile. The description adds that it returns source, privacy, version, hash, and snippet, which is useful but not behavioral beyond the declared read-only nature. No additional constraints like pagination or sorting are disclosed, so the description adds modest value.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.