diff --git a/biobb_common/configuration/settings.py b/biobb_common/configuration/settings.py
index b41430b..4e1a5b1 100644
--- a/biobb_common/configuration/settings.py
+++ b/biobb_common/configuration/settings.py
@@ -52,11 +52,19 @@ class ConfReader:
         system (str): System name from the systems section in the configuration file.
     """
 
-    def __init__(self, config: Optional[str] = None, **kwargs):
+    def __init__(self, config: Optional[str] = None, *args, **kwargs):
         self.properties = self._read_config(config)
         self.global_properties = self._get_global_properties()
         self.working_dir_path = fu.get_working_dir_path(working_dir_path=self.global_properties.get("working_dir_path", None), restart=self.global_properties.get("restart", False))
 
+    def get_working_dir_path(self) -> str:
+        """get_working_dir_path() returns the working directory path.
+
+        Returns:
+            str: Working directory path.
+        """
+        return self.working_dir_path
+
     def _read_config(self, config: Optional[str] = None) -> Dict[str, Any]:
         """_read_config() reads the configuration file and returns a dictionary.
         """
diff --git a/biobb_common/generic/biobb_object.py b/biobb_common/generic/biobb_object.py
index 3791955..376c263 100644
--- a/biobb_common/generic/biobb_object.py
+++ b/biobb_common/generic/biobb_object.py
@@ -146,7 +146,7 @@ def check_properties(
     ):
         if not reserved_properties:
             reserved_properties = set()
-        reserved_properties = {"system", "working_dir_path"}.union(reserved_properties)
+        reserved_properties = {"system", "working_dir_path", "tool"}.union(reserved_properties)
         reserved_properties = reserved_properties.union(set(self.global_properties_list))
         error_properties = set([prop for prop in properties.keys() if prop not in self.__dict__.keys()])