Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations, the description carries the full behavioral burden. It does disclose two genuinely useful facts absent from structured data: execution is 'paid' (a cost implication) and a completed run returns an 'RVO plus signed R/IV Verification Receipt.' However, it omits auth requirements, rate limits, and what happens on partial/failed execution.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.