What is hard is integrating across SAAS solutions that haven't done this yet in a way that is secure and easy. Most MCP things out there are so far about exposing things that have a very low value. All the high value stuff is locked up behind APIs, authorization, secure networking (i.e. not publicly accessible typically), etc.
Bridging that stuff is going to generate a lot of work in the next few years and more importantly, companies are going to spend large amounts of money on this because it can deliver a lot of value to them.
People that believe that this is going to be a done deal in six months are dreaming. It's more like ten years. But that just means that there is good money to be made by people that can do this stuff and that can navigate the decades of byzantine digital cruft in the corporate world. You can already see the usual suspects (big consultancy companies) sniffing around this topic. There will be lots of such companies doing a brisk business by the end of this year.