Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
The annotations already declare readOnlyHint=true and destructiveHint=false, so the safety profile is covered. The description adds the useful context that this is a global catalogue rather than a user- or company-scoped list. It does not disclose ordering, response shape, or other behavioral details, but for a simple read-only list the annotations plus context are adequate.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.