[ykhli]

How do MCPs actually work, where are the real use cases, and the challenges today.

[mindcrime]

I don't think too many people are going to want to write the essay that would be needed to truly answer that. I would just point you to:

https://modelcontextprotocol.io/introduction

and/or any of the dozens of Youtube video introductions to MPC, to get a good feel for how it works, and how people are using it.