Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations, the description carries full burden but only states it diagnoses problems without detailing behavioral traits like what it inspects (e.g., logs, configurations), whether it's safe or destructive, or what output to expect. It adds minimal context beyond the basic purpose.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.