Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations indicate this is a non-read-only, non-destructive, non-idempotent, open-world operation, but the description adds no behavioral context beyond what's in annotations. It doesn't explain what 'start' entails (e.g., whether it requires specific permissions, what happens if the MongoDB is already running, or any side effects). With annotations covering basic hints, the description adds minimal value.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.