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hard★ EssentialAnthropicGlean

Design an MCP server that gives an agent access to a customer's Salesforce, Slack, and HR system. Make it safe.

An agent with write access to a CRM, a chat tool, and an HR system is one bad tool call from emailing salaries to a channel. Safety is least-privilege scopes, a hard read/write split, human approval on destructive actions, and an audit log of everything.

Updated Aug 2026 · Grounded in real Forward Deployed Engineer interview loops and written to a senior-engineer editorial bar.

An agent with write access to a CRM, a chat tool, and an HR system is one bad tool call from emailing salaries to a channel. Safety is least-privilege scopes, a hard read/write split, human approval on destructive actions, and an audit log of everything.

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Next in this trackA customer wants a computer-use agent operating inside their CRM and ticketing apps. How do you deploy it safely?PremiumNext in this trackYour agent issued a refund to the wrong customer. The tool call succeeded, the schema validated, and the eval says the task passed. Find it.PremiumNext in this trackA company has about 300 agents built by different teams and no inventory. The CISO wants control. Design the agent registry.Premium
FEDITOR'S NOTE

The senior signal is designing the MCP server as a policy enforcement point, not a thin passthrough: per-tool least-privilege scopes, read tools separated from write tools, human-in-the-loop approval and dry-run on anything destructive or cross-system, and a complete audit log. Strong candidates treat the agent as untrusted and prevent exfiltration (HR data into a public Slack channel) and accidental overwrite, with reversibility. Watch for candidates who hand the agent a broad admin token, or who trust the model to 'be careful' instead of enforcing limits server-side.

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