Whisk together the agave (or maple syrup), mustard, salt, and pepper in a small bowl to make the honey mustard sauce. Set aside.
Drain the tofu block and wrap in a clean kitchen towel. Press firmly for 10 minutes to remove excess moisture. Slice into uniform 1-inch strips.
In a mixing bowl, combine flour, cornstarch, baking powder, salt, and paprika. Gradually add water and whisk until a smooth, thick batter forms. Adjust water as needed.
Dip each tofu strip into the batter, coating it well. Transfer to the panko breadcrumbs and press gently to coat evenly. Repeat with all strips.
Preheat oven to 350°F (175°C). Line a baking tray with parchment paper. Arrange coated tofu in a single layer and brush or spray lightly with neutral oil.
Bake for 30–35 minutes, flipping halfway through, until golden brown and crispy.
Remove from oven. Brush or spoon honey mustard sauce generously over each tender. Return to oven for 5–8 minutes until the glaze sets and caramelizes slightly.
Serve immediately with extra honey mustard sauce on the side for dipping.