Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations, the description carries the full burden. It usefully discloses that the tool can operate against real or mock data ('use_real_api') and that results include win probability, optimal pricing, and strategy. It does not state cost, latency, rate limits, or whether recommendations are persisted, leaving real behavioral gaps for a 6-param analysis tool.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.