I just need intent and a description of HOW they are going to do something.
Trying to seduce someone, what do you do? Bring flowers, compliment them etc...
Trying to intimidate? Are you threatening violence, blackmailing their family?
Trying to persuade? What are you offering? Is what you're offering valuable to the NPC?
I just need the basics.
To me, what's important is:
- the NPC's motivations (sometimes intimidation works better than seduction, reducing the DC but the method of intimidation might reduce it more (blackmail vs threats of violence).
- The PCs approach. Some approaches may not work at all - no roll necessary, it fails. Some approaches auto-succeed.