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UNIX didn't really solve this scenario. Yes, you can limit what local files a user has access to. But with web applications and cloud services being so ubiquitous, the local boundaries are pretty much meaningless. Forcing an agent through an MCP is a way to grant access to remote services while still restricting how the network access can be used.

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Network administrators also solved these things, e.g. you can limit what websites a virtual machine is allowed to access.

Now, if you’re letting your agents abuse network traffic there becomes a point where you’re criminally liable. Unfortunately the current US government has no interest in prosecuting such abuse.

It's not so easy, because HTTPS thwarts attempts to filter out unwanted API calls, for example.

Maybe I overestimate the ability for corporate network administrators to block and detect access to certain websites from within their networks, like adult websites. My understanding was that there’s no way to circumvent those network controls.

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