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Documentation Index

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MCP stands for Model Context Protocol. You can think of an MCP server as a highly secure, standardized plug socket. The Primary Agent uses tool calling to reach external systems — your hospital’s Electronic Medical Record, or a personal tool like Notion, Google Calendar, or Gmail — through an MCP server. It cannot connect directly. An MCP server is a small piece of software that acts as a translator and a security guard between the AI and whatever system it’s connected to.
MCP servers run outside Isa — requests pass through them on their way to the external system. If you are using a cloud-connected MCP server, that data leaves your device. See On-device vs cloud for the full picture.

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How it works in practice

You ask the Primary Agent to pull up the latest lab results for a patient in Bed 4. The Primary Agent does not have direct access to the hospital’s private lab database. Instead, it sends a formal request to the hospital’s MCP server. The MCP server checks who is asking, verifies that you have the right permissions, translates the request into a language the lab system understands, retrieves the results, and hands them securely back to the Primary Agent. If the Primary Agent tries to ask for something it should not — like the records of a patient not under your care — the MCP server blocks the request.

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Why it matters for clinicians

  • Security: MCP servers ensure that the Primary Agent can only access the exact data it is permitted to see, keeping patient information compliant with hospital policies.
  • Easy integration: Existing software does not have to be rebuilt. Plug an MCP server in front of it, and the old system can talk to modern AI — whether it is a hospital EMR or a personal tool like Notion or Calendar.
  • Shared access: Any MCP server registered on the Community Hub can be installed into Isa, giving you access to a growing set of tools — both clinical systems and personal services.

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Next

Add an MCP server

Register an MCP server in the Community Hub and install it in Isa.

Tool calling

Understand how the Primary Agent invokes external functions through MCP.