Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already declare non-read-only, non-idempotent, non-destructive, closed-world. The description adds real business semantics beyond that: one influencer at a time, a fixed 4-week window from the first proposed action date, and share of net revenue across every store. It does not clarify what a duplicate call does given idempotentHint=false, which is the main remaining gap.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.