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AI Engineering Intermediate Pro

MCP and Tool Integration Protocols

Why the industry standardized tool integration, and how to reason about it in a design interview

25 min read 6 views

The concept and design-interview layer above MCP: why a standard client-server protocol replaced bespoke per-app tool integrations, the server/client/resource/tool abstractions at an architectural level, what MCP adds on top of plain function calling (and when bespoke calling is still the right answer), the trust boundary a third-party server introduces, and how to frame the 'build a server vs write a function' decision when an interviewer asks.

Practice questions (5)

  • MCP Server or Bespoke Integration?

    Intermediate · Free
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  • Explaining the Integration Problem MCP Solves

    Intermediate
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  • Reviewing an Untrusted MCP Server Before Connecting It

    Intermediate
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  • Why Tools, Resources and Prompts Aren't Interchangeable

    Intermediate
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  • What MCP Adds on Top of Function Calling

    Intermediate
    View →

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