The Open-Source Local Sandbox Agents, MCP Servers, and Unknown Apps Actually Need

nilbox is pitched as a cross-platform local sandbox for AI agents, MCP servers, and untrusted apps.

It uses VM isolation and default-deny network access to keep risky code off the host and away from user secrets.

The open-source tool supports Windows, macOS, and Linux, and is designed for one-click setup.

The article frames agents, MCP tools, and unknown apps as the same host-level security problem.