Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Beyond the annotations (readOnlyHint=true, destructiveHint=false), the description discloses what the audit covers and what kinds of issues it flags. The explicit 'Read-only' statement reinforces the annotations without contradicting them, adding practical 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.