https://rochanewton.github.io/tags/tool-use/Recent content in Tool-Use on Newton RochaHugo -- gohugo.ioen© 2026 Newton RochaThu, 24 Sep 2026 00:00:00 +0000https://rochanewton.github.io/posts/claude-architect-03-tool-design-mcp-integration/Thu, 24 Sep 2026 00:00:00 +0000https://rochanewton.github.io/posts/claude-architect-03-tool-design-mcp-integration/<h2 class="relative group">What this is about <div id="what-this-is-about" class="anchor"></div> <span class="absolute top-0 w-6 transition-opacity opacity-0 -start-6 not-prose group-hover:opacity-100 select-none"> <a class="text-primary-300 dark:text-neutral-700 !no-underline" href="#what-this-is-about" aria-label="Anchor">#</a> </span> </h2> <p>Domain 2 — <strong>Tool Design &amp; MCP Integration</strong> — 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&rsquo;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&rsquo;t work the way you expected.</p>