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Module 12 · Project: a read-only MCP server

Project: a read-only MCP server

4 min read5 min readReviewed 26 October 2026

In short

Build an MCP server with two read tools for one notes folder, narrow inputs, clear errors and credentials from environment variables. Test it directly, through an agent, and with a note that hides instructions.

After this lesson you can

  • Build a read-only MCP server with two tools and strict schemas
  • Test the MCP server with a document that hides instructions

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