Heirloom Tomato and Chicken Toss

Whisk together vinegar, olive oil, sugar, salt, and pepper in a small bowl. Gently toss together chicken, tomatoes, onion, basil, chives, parsley, and thyme in a large bowl. Add vinegar mixture, and gently toss until thoroughly combined. Serve immediately, or cover and let stand at room temperature for up to 1 hour.