MCP architecture scenarios — CCA-F Exam Prep

L3.07|MCP architecture scenarios

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MCP vs Direct API vs No Tools

Three ways to connect an agent to the outside world. Each has a sweet spot.

MCP (Model Context Protocol) is Anthropic's standard for connecting AI agents to tools and data sources. But it's not always the right choice. The exam tests whether you know when to use each approach.

MCP SERVER

Standardized protocol. Reusable across apps. Discovery, auth, and tool schemas built in. Best for: shared services, team-wide tools, ecosystem integrations.

DIRECT API

Custom integration. Tighter control. No protocol overhead. Best for: internal APIs, performance-critical paths, simple one-off integrations.

NO TOOLS

Just the model's knowledge. No external calls. Best for: conversational tasks, writing, analysis of provided data.