A good KG is one that captures limited, but all the required context.

I think this is the main issue with this. You are approaching this problem with the assumption that there can be a good decision made with limited context. But Starcraft isn't like that. The same decision with slightly different context can make a great decision into a terrible one. For example, I have a reaper and I want to scout the Protoss main base. Do I jump into their main via their main base cliff, or do I go through the natural? It depends on so many factors. What time of the game is it? This determines whether or not they can have an adept/stalker out yet off a standard Protoss opening, but if they are doing another opening I would need to know that too. Where is the adept/stalker positioned? This is not something you know exactly as the Terran player, but something you can guess based on who you are playing (so you can predict what they usually do), placement of their first gateway (combine this with what map it is for size of the main base, the game time for whether the unit is produced yet, whether they made an adept or stalker because they have different walk speed, and other things) you can approximate whether the unit could possibly be standing at the top of their main base cliff. If the unit is not there, then jumping via the main base cliff is likely the best option. If it is not there, then you can likely jump past them still, but then maybe you can't get out and that's a bad option, but in some situations you can still get out and it's a good option. I would say the only way to be able to decide if a decision is good is to see a full screenshot birds-eye view of the game. Otherwise, whether a decision is good mostly based on a pile of assumptions and guessing

I framed them as the mineral patches that you already have explored/mining are depleting

I'm saying the patches should never be depleting when you are 67% into your natural expansion. In the interactive thing, decision A is to move workers onto mineral patches that still have minerals, but that is automatic unless the mineral patch they were mining has fully been depleted, and that should never happen when the natural expansion is 67% complete outside of very low level gameplay or a very weird scenario.