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Simon Willison1 min readintro

MCP was always a bad idea?

Read on simonwillison.net

Summary

The author argues that Model Control Protocol (MCP) still has value even with powerful coding agents. MCP lets you control service access, manage authentication safely, provide a UI for connections, and keep audit logs.

  • MCP lets you restrict which external services an LLM agent can call.
  • It enables handling authentication without exposing API keys to the agent.
  • Provides a UI for users to connect and authenticate additional services.
  • Offers strong audit logging of agent interactions with external services.

Developers building LLM agents that need controlled, auditable external service access should care.

3/10
llmapi designobservabilitysecurityml infra

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