Introduction: Why Agentic Systems Need MCP Model Context Protocol (MCP) is a standardized communication framework specifically designed to manage complex, stateful interactions between AI agents and backend infrastructure. If you've moved beyond simple LLM completions and are building agentic applications, you've likely experienced the complexity. An agent, unlike a basic chatbot, perceives, reasons, plans, and acts dynamically. Managing its evolving state — plans, internal reasoning, tool usage history, and environmental understanding — rapidly becomes complex, brittle, and difficult to scale using traditional REST APIs. MCP provides a structured solution, centralizing state management and enabling clean, maintainable agent implementations.