Pedantic
Legend
Right, I'm saying this doesn't need to be in the GM's hands at all. You could write a sufficiently detailed stealth system before play, then have the GM simply apply it to any given situation. Those decisions about difficulty and repeated rolls could be made by someone else ahead of time, thus that players can know them before play begins.I’d suggest it’s a bigger problem. I mean at some point you get a feel for your DMs style and so in a sense learn this aspect for your given table. But making tactical/strategic decisions before you’ve ’found the pattern’ makes this nearly impossible. In practice this ‘unknown’ means players are much more conservative when trying things that are likely to rely on skill checks than they might otherwise be.
That said it seems like determining the appropriate level of zoom/granularity for a an action declaration in a narrativist game yields similar results.
To my view, the primary argument for detailed rules is to make it clear to players precisely what their characters can do. The primary argument for PC/NPC transparency is so that those same players can also transitively know what other characters can do.