Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations the description carries the full burden, and it does disclose useful behavior: a payment/auth requirement (x402 header or banked credit), a price point, and a per-operator trial limit. However it says nothing about side effects, idempotency, whether matching mutates the assets/traces, or what happens on zero matches — significant gaps for an unannotated tool.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.