Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already declare readOnlyHint=true and destructiveHint=false. The description adds valuable behavioral specifics: outlier detection thresholds (≥2× or ≤0.5× median), scope-gap normalization, and consolidated red flags, giving an agent a concrete picture of the analysis performed without contradicting annotations.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.