So, basically -- it's a method for the MCP Server to display a UI element to the user allowing the user to perform some kind of action. Current, this UI will be an HTML iframe.
I think I got confused by their barchart example. I thought this would have been just as easily supported by the MCP server sending back a PNG/PDF of a barchart for the main interface to display (I also generally think of barcharts as static content). But, the idea of adding specific user interaction elements (buttons) helps to make the concept more clear to me.
So, basically -- it's a method for the MCP Server to display a UI element to the user allowing the user to perform some kind of action. Current, this UI will be an HTML iframe.
I think I got confused by their barchart example. I thought this would have been just as easily supported by the MCP server sending back a PNG/PDF of a barchart for the main interface to display (I also generally think of barcharts as static content). But, the idea of adding specific user interaction elements (buttons) helps to make the concept more clear to me.