Q: how do you come up with ideas on sheet music. do you not fear the ambiguity
A: as long as you give a tempo marking, and some descriptive phrases at the top of the page, and then notate it accurately, i'd say there's gonna be no more ambiguity than if you recorded an audio memo using a keyboard and voice with a similar amount of descriptive phrases. anything short of producing the entire final product is going to give you some ambiguity