This x is a proprietary idea from John Doe.
is used, as you might expect, to indicate that descriptions of x should not be shared without just cause.
However, I want to change the sentence to indicate that it is our idea to keep the idea close, and that Mr. Doe isn't even expecting us to take this measure.
Can you suggest any short modification to this sentence that would not be confusing, and not be long. A word that says 'effected without request', 'on our own occord'.
I hope I am not too far off topic. I ask this because I have a hunch that there is a really cool way to say it that I hadn't thought of.
Edit: My current solution: Thanks, I couldn't think up that word for some reason.
We are voluntarily keeping this x proprietary for Mr. Doe.
I expect the audience will understand it unambiguously.
The only thing remaining is that it doesn't clarify that Mr. Doe is unaware we are doing this for him. This is a minor imperfection, but I welcome suggestions.