Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations, the description carries the full burden of behavioral disclosure. 'Challenge-aware' hints at some contextual behavior, but it is not explained—does it require a challenge token, verify something, or interact with other systems? No side effects, permissions, or mutation details are disclosed.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.