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From LLM to Agent: Why Token-In-Token-Out Is Not Enough

March 25, 2026 · 12 min read

llm agent rag mcp engineering

Table of Contents The Fundamental Limitation: Stateless Text Generation RAG: Giving the Model Knowledge It Doesn’t Have Tool Use: From Talking to Doing MCP: A Standard Interface for Tools Deep Dive: MCP in Action Skills: Reusable Task...