AI agents are only as good as the tools they call. We make the case for Rust as the default language for agent tooling: single-binary, zero dependencies, memory safe, and runs anywhere. Lessons learned from porting real AI capabilities into standalone Rust CLI tools — what the process looks like, which parts of the Rust ecosystem are production-ready, and how to think about the boundary between Python (where your models live) and Rust (where your tooling should live).