How Much Info Does Limited Wish Grant?

[emperor norton]

If used to reveal unknown information, how much would this spell grant to the caster?

[Pizza Lord]

It can duplicate the effects of a 6th-level or lower wizard spell, so probably details and information along the lines of legend lore or contact other planes depending on what you're asking about.
It can also duplicate some divine spells, so if a viable one would give a better form, or more complete answer, then go with the amount and type of information that spell would use and assume limited wish is at least capable of providing it.