diff --git a/groundingdino/util/inference.py b/groundingdino/util/inference.py
index d6e81d8..58528ed 100644
--- a/groundingdino/util/inference.py
+++ b/groundingdino/util/inference.py
@@ -98,6 +98,18 @@ def predict(
 
 
 def annotate(image_source: np.ndarray, boxes: torch.Tensor, logits: torch.Tensor, phrases: List[str]) -> np.ndarray:
+    """    
+    This function annotates an image with bounding boxes and labels.
+
+    Parameters:
+    image_source (np.ndarray): The source image to be annotated.
+    boxes (torch.Tensor): A tensor containing bounding box coordinates.
+    logits (torch.Tensor): A tensor containing confidence scores for each bounding box.
+    phrases (List[str]): A list of labels for each bounding box.
+
+    Returns:
+    np.ndarray: The annotated image.
+    """
     h, w, _ = image_source.shape
     boxes = boxes * torch.Tensor([w, h, w, h])
     xyxy = box_convert(boxes=boxes, in_fmt="cxcywh", out_fmt="xyxy").numpy()