I work with small companies on their AI projects and I keep running into the same thing: people throw around “agent,” “RAG,” and “MCP” like they’re interchangeable, and nobody’s really on the same page. The comparison that works best when I explain it to non-technical folks is the human body. The LLM is the brain. RAG hands it books to read so it answers from your actual documents. MCP is how it plugs into your tools and data. An agent gives it hands, so it can do things instead of just talkin...