Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already declare readOnlyHint=true, idempotentHint=true, and destructiveHint=false, so the safety profile is established. The description adds useful behavioral context beyond annotations by specifying how the path parameter changes the output granularity (whole layout vs. scope-specific files vs. one file per clip/link).
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.