MCP Run is a platform that allows for the execution of Python code securely through a method involving WebAssembly (Wasm) and a JavaScript runtime (Deno). The specific implementation runs Pyodide, which enables Python to be executed in the browser environment. This system aims to sandbox Python code in a secure way, preventing potentially harmful operations from affecting the system. However, there are concerns raised about the complexity and efficiency of this approach, with questions about whether it is indeed the best method for sandboxing Python code.