Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already declare readOnlyHint=true and destructiveHint=false, so the safety profile is clear. The description adds value by noting the 'public' scope and 'advisory' nature of the information, which are useful contextual additions. However, it does not elaborate on authentication needs, rate limits, or other behavioral aspects beyond 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.