Chili heat is only one kind of intensity
The idea
A dish may feel intense because of garlic, sharp citrus, a fragrant spice or chili heat. These sensations are not identical. Asking whether food is spicy can therefore lead to an incomplete answer unless you explain which kind of intensity you enjoy or want to avoid.
A practical next step
For a hot-sauce order, ask specifically about heat. For a mild meal, also consider your preferences for garlic and tart garnishes.