Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Beyond the annotations, the description discloses that the tool returns a user-facing authorization URL, requires user interaction (clicking Allow), asynchronously creates the connection, and provides a handoff_id used for polling. This is meaningful behavioral context that annotations alone do not convey.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.