Part 3 ended with a debt: tools that live outside the process, MCP servers, how they enter the window, and how to keep that surface small.

This is Part 4 of 6 in my Agentic Coding with Claude Code series. The working model I am keeping is simple: the model still reasons. The harness still decides. MCP is how tools and context live outside the process and still enter the window as a governed surface.

Later posts will cover evaluation and observability, then bounded autonomy. This one stays on the MCP boundary.

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Following our coverage of Google’s Introduction to Agents, this post dives into the companion whitepaper on Agent Tools and Model Context Protocol (MCP). While the first paper covered agent architecture, this one focuses on how agents interact with the world through tools and the emerging interoperability standard.

Source: Agent Tools & Interoperability with MCP (PDF) by Google

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