Your question gets to the primary reason why jazz uke is so challenging. There are so many options and chords can be used in so many different ways - it's hard to keep it all in order. In some ways, despite having only four strings, it isn't that much different a question than jazz guitar players encounter. Many times Jazz guit players use only three strings.
One important factor is the chord progression - i.e., what's before or after the chord you are identifying. It's often desirable to find a chord that changes only a note or two from the previous chord - but not always because on the uke, subtle changes like for example, B-7b5 to G7b9 to G7 may sound better or be easier to discern if they aren't played in the same position - even though it's basically a change of only one note (A, Ab. G) if you play them between the third and fifth fret. I think of it as chord choreography. In this example, if the clarity of the second chord (G7b9) was important to the melody or the sense of change in the tune, it might be more effective to play it (a spider chord) on the first and second frets instead of the fourth and fifth.
Duk