fix schema

tool.py

@@ -76,11 +76,7 @@ class BrightDataScraperTool(Tool):
 
         return None
 
-    def _parse_file_dict_string(self, value: str) -> Optional[dict]:
-        import ast
-
-        try:
-            parsed = ast.literal_eval(value)
-            return parsed if isinstance(parsed, dict) else None
-        except (ValueError, SyntaxError):
-            return None
+    def _ensure_scheme(self, url: str) -> str:
+        if url.startswith(("http://", "https://")):
+            return url
+        return f"https://{url}"