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

· Armin Ronacher · Aug. 18, 2025, 8:14 a.m.
Summary
This blog post presents an exploration of challenges and improvements in using command line tools (CLI) with an MCP (Meta Command Protocol) server that executes Python code. It discusses the limitations of CLI tools in terms of platform dependence and session management while proposing an innovative approach that leverages a Python interpreter to maintain state and facilitate more reliable tool execution and composability for debugging processes. The author shares personal experiences and technical details regarding the implementation and functionality of the pexpect library to enhance debugging efficiency.
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