Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
No annotations are provided, so the description carries the burden. The verb 'Lists' transparently indicates a read-only operation, and the description discloses the output fields (title, description, link) and adds the follow-up behavioral instruction to offer connecting the client with Walnai. This goes beyond a bare mention and helps the agent understand the expected workflow.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.