diff --git a/semantic_router/index/pinecone.py b/semantic_router/index/pinecone.py
index 23c5a05a..8732b328 100644
--- a/semantic_router/index/pinecone.py
+++ b/semantic_router/index/pinecone.py
@@ -520,6 +520,7 @@ def add(
         function_schemas: Optional[List[Dict[str, Any]]] = None,
         metadata_list: List[Dict[str, Any]] = [],
         batch_size: int = 100,
+        # TODO: Maybe include threshold in the metadata.
     ):
         """Add vectors to Pinecone in batches."""
         if self.index is None: