I saw a question on another site about what attributes do. I had to go back and look through the code and here is what I found:
STRENGTH:
- BONUS TO HIT DAMAGE IN BATTLE
- DETERMINE MAX EQUIPMENT BURDEN ($)
INTELLECT & WISDOM:
THESE WORK IN TANDEM TO:
- DECREASE DAMAGE FROM FAILED SPELL 'COUNTERSPELL' (Wisdom Only)
- INCREASES CHANCE OF SPELL SUCCESS (Equal Parts)
- RESIST MONSTER MAGIC ATTACKS (1 part Wisdom + 4 parts Int)
AGILITY:
- BONUS TO CHANCE OF EVADING ENEMY HIT
VITALITY:
- BONUS TO INCREASE IN HEALTH MAX ON LEVEL UP
($) All items currently have a weight value but this was never implemented.