The general bar for tasks it can be expected to perform is "what an intelligent human would find reasonably doable in the course of their own gameplay". Creating a simple redstone adder for very small numbers is something that I bet many Manifold users could figure out on their own with a bit of research, so that can be required of the AI. Creating a redstone computer that implements a Twitter clone on a 1024x1024 block display is not reasonable for a human to do without mods, so cannot be asked of the AI.

I reserve the right to edit these criteria in accordance with the spirit of the question: "Will we have an AI that can play Minecraft just as well as a human, including the social aspects of multiplayer?"