mcp-rust-builder

The server uses `std::process::Command` extensively to run `cargo` and `git` commands. Inputs to these commands are generally validated and constrained (e.g., specific project paths, crate names, predefined git operations, regex-validated error codes), limiting arbitrary command injection. Path arguments are explicitly converted to `PathBuf` and checked for existence. The `patch_file` tool operates with a first-match replacement and provides diagnostics for whitespace errors rather than full file overwrites, enhancing safety. 'cargo add' and 'cargo test' inherently involve network requests to crate registries, which is expected behavior for a Rust development agent. No direct use of 'eval' or hardcoded secrets found. The overall design prioritizes controlled execution within a development context.