Upload tools.py

tools.py

@@ -37,12 +37,17 @@ class ExcelLoaderTool(Tool):
         Read .xlsx/.xls/.csv from disk and return rows as a list of dictionaries with string keys.
     """
     inputs = {
-        "path": {"type": "string", "description": "Path to .csv/.xls/.xlsx file", "required": True},
+        "path": {
+            "type": "string",
+            "description": "Path to .csv/.xls/.xlsx file",
+            "required": True
+        },
         "sheet": {
             "type": "string",
             "description": "Sheet name or index (optional, required for Excel files only)",
             "required": False,
             "default": "",
+            "nullable": True
         }
     }
     output_type = "array"
@@ -52,7 +57,7 @@ class ExcelLoaderTool(Tool):
         if not os.path.isfile(path):
             raise FileNotFoundError(path)
         ext = os.path.splitext(path)[1].lower()
-         # Handle empty string as None for sheet
+        # Handle empty string as None for sheet
         if sheet == "":
             sheet = None
         if ext == ".csv":