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MCP was always a bad idea?

L3 · BuilderOpinion & AnalysisSimon Willison's Blog· 9/20/2026

Builders choosing between MCP and direct API access for AI agent infrastructure need this nuanced take on real-world constraints.

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Simon Willison defends MCP's value for controlled agent deployments with security, auth, and audit requirements despite full-access terminal agents making it seem obsolete.

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