What you're talking about is sometimes referred to as "exercising covert agency" and IMHO it's absolutely essential for the well-being of creative folks in heavily project-managed corporate workplaces.

"Not keeping secrets" effectively ends up meaning that you need "permission" or at least consent for everything you work on. Depending on how tight things are this can be a recipe for misery because it's common in managerial ranks for people to be change-averse to the point of absurdity.