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 covered. The description adds the visibility scoping ('visible to the authenticated partner'), which is useful context beyond the annotations. However, it doesn't disclose other behavioral traits such as pagination, sorting, or response size, leaving some uncertainty for the agent.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.