In my opinion, no, it's not. The only spicy ingredient is the chili powder, but you're only using 1 tsp to flavor 1 pound of chicken + 1 pound of veggies + lots of sauce. So it does not add any real heat to the dish. And without it, the dish would be bland. To make the dish spicier, add more chili powder, a tiny pinch of cayenne pepper, or garnish with dried red chile flakes.