Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
No annotations are provided, so the description must carry the full burden. It makes the read-only nature and combined output clear, but does not disclose return format, potential errors, or any authentication requirements. The 'one call' efficiency hint adds some behavioral context beyond the tool name.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.