MCP: What It Is and Why It Changes How You Build AI Tools

Tue, 21 Apr 2026 10:00:00 +0530

Before MCP existed, adding tools to an AI application meant writing the same glue code over and over. You had OpenAI’s function calling syntax. Anthropic had tool use with a slightly different schema. LangChain abstracted over both, but now you depended on LangChain’s versioning decisions. Every new model provider meant rewriting your tool definitions. Every new tool meant re-registering it across every AI integration you maintained.

Build Your Own MCP Server on Nitin Kumar Singh

MCP: What It Is and Why It Changes How You Build AI Tools