Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations provided, the description carries full burden for behavioral disclosure. It only states what the tool does (retrieves comment lists) without mentioning whether this is a read-only operation, if it requires authentication, what format the output takes, pagination behavior, or error conditions. For a retrieval tool with zero annotation coverage, this is insufficient.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.