Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations, the description carries the behavioral burden. It discloses that the operation returns a token granting write access and instructs the agent to save it, which is meaningful. However, it does not mention whether the dashboard is persisted, whether it can be overwritten, or any side effects beyond token issuance.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.