Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already declare readOnlyHint=true and destructiveHint=false, so the read-only nature is known. The description adds the 'public published' scope, which is useful context beyond annotations. However, it does not disclose pagination, sorting, or any response format details, though the output schema likely covers some of that.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.