Full Idea
For action to be properly yours it must be you who is the causal originator of the action, rather than some state or event within you.
Gist of Idea
An action is only yours if you produce it, rather than some state or event within you
Source
Rowland Stout (Action [2005], 4 'Agent')
Book Reference
Stout,Rowland: 'Action' [Acumen 2005], p.63
A Reaction
[He invokes Chisholm 1966] The idea here is that we require not only 'agent causation', but that the concept of agent must include free will. It seems right we ought to know whether or not an action is 'mine'. Nothing too fancy is needed for this!