Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations provided, the description carries the full disclosure burden, but it only implies a read operation through the word 'show'. It discloses nothing about the response format, error behavior for invalid topic_ref values, whether the full discussion is returned, or any prerequisites. It does not contradict any annotations, but it adds almost no behavioral context.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.