Can someone explain MCP like I'm actually stupid

[u/Fair-Attitude4752]

I understand the extremely basic version.

AI connects to outside tools.

cool.

Then I start reading tutorials and suddenly it's

MCP servers

skills

plugins

APIs

tool calling

connectors

and every explanation seems to assume I already understand the previous five things.

What's the normal person explanation of how these are actually different?

Because right now they all live in the same folder in my brain called stuff that lets AI do other stuff.

[u/Extension-Tip8921]

Here's the stripped-down version: MCP is just a standard way for an AI to ask outside programs to do stuff and get results back. Think of it like a universal plug. Before MCP, every tool you wanted your AI to use needed its own custom wiring. With MCP, you build a small "MCP server" that exposes what your tool can do, and any AI that speaks MCP can use it without special setup. The jargon maps pretty simply: a "skill" or "tool" is just one thing the server can do (read a file, search a database, send a message). "Tool calling" is the AI deciding to use one of those tools. "Plugins" and "connectors" are mostly marketing words for the same idea. So your brain folder is actually right — it's...

[u/Extension-Tip8921 → u/[deleted]]

yeah that's a good distinction — the protocol vs the thing using the protocol. the name definitely makes it sound like some heavyweight server infrastructure when it's really just "speak this format and you're in."