Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations provided, the description carries full burden for behavioral disclosure. It only states that authentication is required ('要認証'), which is useful but insufficient. It doesn't describe what 'unmuting' entails (e.g., does it restore notifications, affect timeline visibility, or have side effects?), whether it's reversible, or what the output looks like. For a mutation tool with zero annotation coverage, this leaves significant gaps.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.