I used Agfa MCC quite extensively and I would not characterize it as having an "ivory" base. I think "off-white" would be more accurate.
Highlights did have a warmer tint than you would find with Forte, Ilford, or Kodak VC papers. But it certainly was not a warm-toned paper. The shadows were pretty neutral; and they did not exhibit the open quality that the previous poster cites as being characteristic of true warm-toned papers.
It was good stuff, overall. It reached a pretty strong grade 4 with number 5 Multigrade filters and had remarkably high Dmax untoned. It had a surprisingly short toe, despite what the D&R curves on Agfa's own datasheets suggested. It's greatest weakness, in my opinion, was that it exhibited greater dry-down (maybe as much as 10-12%) than any other fiber paper I've had the opportunity to use. It also didn't exhibit much color shift in Selenium - though whether or not that is a weakness depends on the application.