Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
No annotations are present, so the description must carry the burden of behavioral context. It describes a pure calculation with no side effects, which is appropriate for a simple mathematical function. However, it does not explicitly state that the tool is read-only or non-destructive.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.