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 add value by disclosing the two underlying endpoints (/payments/health and /health), which hints at the check's scope. However it says nothing about auth requirements, rate limits, latency, or whether both endpoints must succeed, and 'fetch' only implies read-only behavior.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.