Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations, the description carries the full burden. It discloses the SIGKILL signal, indicating a forceful, uncatchable kill, and notes its experimental purpose. It does not detail side effects or error behavior, but the SIGKILL mention provides meaningful behavioral context.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.