Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations provided, the description carries the full burden of behavioral disclosure. 'List' implies a read-only operation with no side effects, which is helpful, but it does not disclose additional behavioral traits such as response format (though an output schema exists) or potential operational requirements like needing OBS to be running. This is adequate but minimal.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.