Well, I think they are rather self-explanatory charactures, I presume.
A priest will be a spiritual compassionate rightuous style character. Free will be an independent style, Knight will be bold and obedient, etc.
If I have learned anything from this game, it's that people are not going to agree on what kind of behavior is tied to which kind of trait. I've run across more than a few dialogue responses that have triggered unexpected trait changes I totally disagree with. Apparently the writers and I have differing opinions about what compassion means (for example).
Heck, the last time this community had a discussion on personalities, they couldn't even agree on which traits defined a liberal or a conservative. Everyone thinks they're the "compassionate" one.
So, yes.. they should probably offer up a description of what they think a particular personality means.