Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations, the description must convey behavioral traits. It states the method (clang-format, treats as C++) but does not disclose potential side effects (e.g., whether it overwrites files via the 'write' parameter), required permissions, or limitations of treating MQL as C++.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.