Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
No annotations are provided, so the description must carry the burden of behavioral disclosure. It states the output (structured errors, warnings, progress), which adds value, but it does not disclose side effects (likely none), edge-case behavior (e.g., malformed input), or the exact structure of the returned data. The phrase 'last build output' is slightly ambiguous given that the tool takes a build_log parameter, not a reference to a stored log.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.