The M N Tool Calling Problem (And Why MCP Solves It)

📰 Dev.to AI

Learn how the M×N Tool Calling Problem affects AI agent development and how MCP solves it

intermediate Published 16 Apr 2026
Action Steps
  1. Identify the number of AI models and tools/services in your project to understand the scope of the M×N problem
  2. Calculate the total number of custom integrations required without a standard protocol
  3. Research MCP as a potential solution to simplify tool integration
  4. Evaluate the benefits of using MCP in your AI agent development workflow
  5. Implement MCP to reduce the number of custom integrations and improve maintainability
Who Needs to Know This

AI engineers and developers building multiple AI agents will benefit from understanding the M×N problem and how MCP simplifies tool integration

Key Insight

💡 The M×N problem can be solved with a standard protocol like MCP, reducing the number of custom integrations required

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🤖 Simplify AI tool integration with MCP and avoid the M×N problem! 💻

Key Takeaways

Learn how the M×N Tool Calling Problem affects AI agent development and how MCP solves it

Full Article

The M×N Tool Calling Problem (And Why MCP Solves It) If you've built more than one AI agent, you've hit the M×N problem — you just might not have named it yet. What Is the M×N Problem? You have M AI models and N tools/services. Without a standard protocol, every model needs a custom integration with every tool. That's M×N integrations to build and maintain. For 5 models and 10 tools: 50 custom integrations.
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