Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already indicate readOnlyHint=true and openWorldHint=false. The description adds meaningful behavioral context by enumerating the protocol's output components (therapeutic foods, meal structure, foods to minimize, monitoring markers, clinical citations), which helps the agent anticipate the result. It does not mention error handling but is still valuable beyond annotations.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.