Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
There are no annotations, so the description carries the burden of behavioral disclosure. It explicitly discloses that the tool 'returns discovery metadata only,' which is a meaningful guarantee that it does not execute or invoke the discovered APIs. It does not mention authentication, rate limits, or pagination, but for a read-oriented discovery tool the key behavioral trait is covered.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.