Complete with the alt text mentioning USB, which is used in the MCP website to describe it. Someone else said it and I agree, it's not a good analogy. Most of what we do in software development is connecting things. Saying "this is like USB but for X" could cover a huge chunk of what software is.
Besides, this "think of" analogies kinda irk me because I don't want you to give me a mental image you think I can digest, I want to know how it works. Abstractions in software are great and all but the fact that for some reason most explainers have decided they should be opaque is very unhelpful when you're trying to learn.