Exploration into providing MCPs with the most powerful of all tools: code.

Mitsuhiko's blog is a resource for developers and technology enthusiasts seeking to deepen their understanding of programming languages, software architecture, and emerging technologies. With a focus on practical tips, code examples, and industry insights, it provides  guidance and inspiration for professionals looking to stay ahead in the rapidly evolving field of software development. Through  tutorials, technical discussions, and  analyses, the blog fosters a community of learning and innovation among its readers.

Armin Ronacher

MCP servers can be more effective with a single code execution tool rather than multiple specialized tools. The author demonstrates how a Python interpreter with pexpect can handle complex debugging tasks through stateful sessions, allowing AI agents to write and execute code directly. This approach reduces tool complexity from 30+ tools to one while maintaining state between calls and enabling script generation for reuse.

Your MCP Doesn’t Need 30 Tools: It Needs Code