According to a research report by CICC, OpenAI officially announced on March 27 that the Agents SDK has joined the MCP (Model Context Protocol) service agreement, and the ChatGPT desktop application and Responses API will also be quickly supported. In AI Agent, compared with the traditional Function Calling external tool calling method, MCP can greatly reduce the cost of repeated development by decoupling the host, server, and client, while improving the interconnection and interoperability of various AI tools. It is also a key technology for the global reproduction of Manus. With the accelerated support of leading companies, the boundaries of the MCP ecosystem are expected to expand further, accelerating the development of the AI industry.