Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations, the description carries the transparency burden. It discloses the fallback behavior (returning an .env template when params are missing) and implies a read-only network check, but it doesn't explicitly state side effects, success/failure behavior, or auth requirements beyond using the API key.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.