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An MCP agent in fifty lines of code

Summary

Tiny Agents shows a deliberately small agent that discovers and calls tools via the Model Context Protocol. The code makes the planning and execution loop directly comprehensible. The example implementation is about 50 lines of code.

Ideas

  • MCP separates tool description and transport from the actual agent logic.
  • Small reference implementations expose security decisions that frameworks often hide.

Insights

  • Agents only become manageable when tools, permissions and state transitions are visibly limited.

Facts

  • Tools are made available at runtime via MCP servers.

Critique

  • Brevity is helpful for teaching but leaves robust authentication, recovery and policy checks open.

Recommendations

  • Start with an allow list of tools and require confirmation for writing or external actions.

References

Read the original article on Hugging Face

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