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. It states the action is to 'Add a new comment,' which implies a write/mutation operation, but it doesn't disclose any behavioral traits such as required permissions, whether the operation is idempotent, rate limits, or what happens on failure. This leaves significant gaps for an agent to understand how to use it safely and effectively.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.