Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations provided, the description carries the full burden of behavioral disclosure. It only says 'Stop the running API server' and does not disclose consequences such as whether data is lost, whether the action is reversible, whether it is idempotent, or what happens if no server is running. This is a meaningful gap for an imperative lifecycle action.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.