What this is about # Domain 2 — Tool Design & MCP Integration — is 18% of the Claude Certified Architect – Foundations exam, across five task areas: designing tool interfaces, structuring error responses, distributing tools across agents, integrating MCP servers, and choosing built-in tools well. It’s a lighter domain than Agentic Architecture, but arguably the most immediately practical one — every point here shows up the first time you give an agent a tool that doesn’t work the way you expected.
What this is about # Claude Certified Architect – Foundations is Anthropic’s certification for designing Claude systems, not just using them. Where the Claude Certified Associate exam tests whether you can operate Claude with professional discipline — good prompts, sound judgment on output, the right entry point for the job — the Architect exam tests something a level up: can you design the agentic system, the tool integrations, and the configuration that other people build on top of. The ideal candidate has 6+ months of hands-on experience building with the Claude API, the Claude Agent SDK, Claude Code, and Model Context Protocol (MCP) — this isn’t a first certification, it’s the next one.
