We've just started to roll out our MCP Servers and if Anthropic and the community has already moved on, we'll wait till all this churn subsides till switching over next time.
MCP gives the LLM access you your APIs. These skills are just text files with context about how to perform specific tasks.
Depends on who the user is...
A difference/advantage of MCP is that it can be completely server-side. Which means that an average person can "install" MCP tools into their desktop or Web app by pointing it to a remote MCP server. This person doesn't want to install and manage skills files locally. And they definitely don't want to run python scripts locally or run a sandbox vm.
Now wherever they're able to convert that house of cards into a solid foundation or it eventually spectacularly falls over will have to be seen over the next decade.