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. It states 'without modifying NX,' which clearly indicates a read-only, non-destructive operation. However, it does not disclose other behavioral aspects such as what the check involves, whether it may fail under certain conditions, or what the return value looks like. Given the lack of annotations, this is an acceptable but incomplete disclosure.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.