Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already declare destructiveHint=true, idempotentHint=true, and readOnlyHint=false, so the safety profile is covered structurally. The description adds scope value by noting it targets 'LocalForge background child process', implying it won't touch arbitrary PIDs, but it says nothing about whether the stop is graceful or forced, or what happens on an invalid/already-dead id.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.