Design an MCP integration for a document assistant that reads local files safely.

Instruction: Explain server-enforced file scope, bounded reads, and how you handle content that tries to instruct the assistant.

Context: Design a local document integration that reads permitted files without exposing neighboring directories or treating document text as authority.

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I would start with a read-only integration and a user-selected directory. The server would resolve requested paths against that directory, reject escapes, and define whether symlinks are allowed. The permission check must apply to the file actually opened, including protections against path changes between checking and opening.

Reads would have file-size and output limits, permitted formats, and clear errors...

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Work through these questions in order. Read the answer aloud, then explain it in your own words.

1. Start with the foundations

Build the vocabulary and explain the core decisions.

  1. When should a model call a tool instead of answering from context? Free sample
  2. How would you explain MCP to a product engineer in one minute? Free sample
  3. What information should the orchestrator validate before executing a tool call? Free sample

2. Apply it to a real workflow

Practice diagnosis, validation, and everyday tradeoffs.

  1. Why do idempotency and retries matter more with AI-driven tool use? Free sample
  2. How do you keep permission boundaries clear when many tools share overlapping capabilities? Member answer
  3. A user revokes access to a connected app mid-session. How should the AI workflow behave? Member answer

3. Prepare for senior discussions

Explain failure boundaries, recovery, and production choices.

  1. Design a fallback strategy when tools are unavailable, degraded, or unauthorized. Member answer
  2. How do you implement MCP step-up authorization without losing scopes or retrying forever? Member answer
  3. An MCP request resumes after user confirmation. How would you validate its requestState? Member answer

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