Giving an AI agent access to your product means giving it real reach — into your data, your customers, and your systems. Most MCP tutorials hand-wave the part that matters: what the agent can touch, who it's acting as, and what happens when it's wrong.
That's the part I lead with. I'm a network and security engineer, so I scope tools tightly, design auth and rate limits in from the start, and plan for the failure modes before anything ships — so your agent interface is one you can actually trust in production.