1. Toss together first 7 ingredients in a large bowl, and let stand 10 minutes.
2. Meanwhile, prepare pasta according to package directions. Add hot cooked pasta and chicken to tomato mixture; toss gently to coat. Season with salt and pepper to taste. Transfer to a serving platter, and top with basil and cilantro.
*1 (20-oz.) package refrigerated cheese-filled tortellini may be substituted.