Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations provided, the description carries the burden of behavioral disclosure. It states what data is returned but does not mention side effects, errors, or authentication requirements. For a simple metadata lookup with zero parameters, the implied read-only behavior is reasonably clear, but not fully detailed.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.