Full Idea
Intentions are unlike desires. You can simultaneously desire two things that you know are incompatible. But when you form intentions you are embarking on a course of action, and there is a much stronger requirement of consistency.
Gist of Idea
You can have incompatible desires, but your intentions really ought to be consistent
Source
Rowland Stout (Action [2005], 7 'Relationship')
Book Reference
Stout,Rowland: 'Action' [Acumen 2005], p.104
A Reaction
I'm not sure why anyone would identify intentions with desires. I would quite like to visit Japan, but have no current intention of doing so. I assume that the belief-plus-desire theory doesn't deny that an uninteresting intention is also needed.