Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations provided, the description carries the behavioral disclosure burden and does state '只读' (read-only), which is a useful key trait beyond the empty schema. However, it does not cover other behavioral aspects such as permissions, rate limits, or output characteristics.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.