Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations, the description carries the full burden. It discloses the output scope (matrix + ranking, no narrative) and input condition (scores separate), but does not explain normalization details, input validation, or edge cases. The core behavior is transparent enough for a calculation tool, but lacks depth.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.