Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations, the description carries the full burden. "读取...当前状态" does convey that this is a non-mutating state read, which is useful given the name continue_experience could imply mutation. But it says nothing about whether reading resumes/activates the session, what happens on an invalid or expired session_id, or error behavior.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.