add debug tool

src/tools.py

@@ -35,6 +35,15 @@ class PokemonAdvisorTools():
     print(len(knowledge_base))
     print(len(knowledge_base_latest))
 
+    def get_data_shape(self) -> int:
+        """
+        Retrieves the number of data points.
+        Use this when user asks about the number of data points.
+        Returns:
+            int: lenght of knowledge base
+        """
+        return len(self.knowledge_base)
+
     def list_card_names(self, name_query: str) -> list:
         """
         Retrieves a list of card names from the database.