Microsoft is testing the MCP (Model Context Protocol) connector in the latest Windows 11 preview version, allowing third-party AIs like Claude to request local file access through File Explorer. After approval, the AI can read the content and complete tasks without uploading it to the cloud.

The process is similar to "open Claude → input 'make a PPT using data from My Documents' → system pop-up authorization → AI locally parses and generates results." Microsoft demonstrated scenarios such as generating a real estate website with local photos in one click, and having Claude summarize an entire folder and output a PowerPoint. This feature is called "vibe code."

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On the technical level, MCP uses the JSON-RPC 2.0 messaging mechanism, supporting both local stdin/stdout and remote HTTP transmission; the AI side declares the required file types through standardized interfaces, and Windows returns file handles and read-only streams, keeping all data on the local machine throughout.

However, the media has also raised risk warnings: once an AI gains folder-level permissions, it might access sensitive files due to hallucinations; combined with Microsoft's simultaneously tested "proxy workspace," which allows AI to remain in the background, further increasing privacy concerns.

Microsoft stated that basic features (such as Copilot document summaries) will be rolled out in the coming weeks; however, the full file connector for third-party AIs does not have an explicit release schedule yet and will continue to collect feedback through Windows Insider.