Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations, the description carries the full disclosure burden. It hints at behavior by mentioning polling ('怎么轮询'), which is useful context for an agent coordinating the workflow, but it never states that this is a read-only informational resource or what happens on invocation. Modest but incomplete disclosure.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.