Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations provided, the description carries the full burden of behavioral disclosure. It explicitly reveals that calling the tool mutes all other channels and that the effect is temporary, which is key behavioral information beyond the schema. It does not mention edge cases like toggling an already-soloed channel, but 'temporarily' signals reversibility sufficiently for a simple tool.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.