
Steep tea bags in 4 cups boiling water according to package instructions; discard tea bags and let cool.
Combine peaches, raspberries and agave nectar in blender until smooth; strain through cheesecloth or fine sieve.
In a large pitcher, whisk together raspberry peach mixture and brewed tea. Place in refrigerator until chilled.
Serve over ice, raspberries, peach slices and mint leaves, if desired.