Full Idea
By and large, dispositional predicates ascribe powers while nondispositional monadic predicates ascribe properties that are not powers in the same sense.
Gist of Idea
Dispositional predicates ascribe powers, and the rest ascribe properties
Source
Sydney Shoemaker (Causality and Properties [1980], §03)
Book Reference
Shoemaker,Sydney: 'Identity, Cause and Mind' [OUP 2003], p.211
A Reaction
The powers are where the properties come into contact with the rest of the world, so you would expect dispositions to be found at that level, rather than at the deeper level of properties. Sounds good to me.