Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations only provide readOnlyHint=false, indicating a mutation. The description beyond that reveals the SCPI command and that it resets to factory defaults, but does not mention potential side effects such as losing current settings or affecting all channels. Since annotations are minimal, the description carries the burden, yet it adds limited 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.