Preheat the oven to 375 degrees F (190 degrees C).

Mix brown rice flour, brown sugar, pecans, baking soda, and lemon zest together in a mixing bowl. Cut open tea bags and add contents to the bowl. Add butter, agave syrup, and vanilla extract. Blend with a fork until dough comes together.

Roll dough into 1-inch balls and place on a baking stone.

Bake in the preheated oven until edges are lightly browned, 11 to 13 minutes. Cool for 1 minute before transferring to a cooling rack. Gently press any broken cookies back together. Let cool. Repeat with remaining cookie dough.