Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations, the description carries the full burden. It mentions the action ('halts the application and makes it unavailable'), which implies a destructive mutation, but does not disclose behavioral traits such as required permissions, whether the stop is reversible, side effects on related resources, or error handling. This leaves significant gaps for a mutation tool.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.