Your right-hand opponent opens the bidding one diamond, and you must decide what to do with this nice hand (none vul):
Your hand seems too good to pass. An overcall of 1NT seems to be out of the question absent a stopper in diamonds. A takeout double might work, since you have tolerance for the majors. But partner will think you have four hearts. Keep in mind that partner and left-hand opponent likely have no more than 11 points between them.
How about overcalling one spade with that powerful 4-card suit? That gets you into the auction with little risk. It also gives partner encouragement to lead a spade if LHO gets the contract.