diff --git a/gdsfactory/component.py b/gdsfactory/component.py
index 852aba2a18..2988abee2d 100644
--- a/gdsfactory/component.py
+++ b/gdsfactory/component.py
@@ -261,7 +261,7 @@ def __iter__(self):
         """You can iterate over polygons, paths, labels and references."""
         return itertools.chain(self.polygons, self.paths, self.labels, self.references)
 
-    def get_polygon_enclosure(self):
+    def get_polygon_enclosure(self) -> Polygon:
         """Returns shapely Polygon with enclosure."""
         import shapely
 
@@ -274,7 +274,7 @@ def get_polygon_bbox(
         bottom: float | None = None,
         right: float | None = None,
         left: float | None = None,
-    ):
+    ) -> Polygon:
         """Returns shapely Polygon with bounding box.
 
         Args:
diff --git a/gdsfactory/functions.py b/gdsfactory/functions.py
index c03e7bcf23..ce0df437e0 100644
--- a/gdsfactory/functions.py
+++ b/gdsfactory/functions.py
@@ -265,19 +265,16 @@ def add_marker_layer(
     *,
     marker_label: str | None = None,
     flatten: bool = False,
-    **kwargs,
 ) -> Component:
     """Adds a marker layer from the convex hull of the input component.
     Used as a decorator for `@gf.cell(decorator=partial(add_marker_layer, marker_layer=...)))`
+    or as a decorator `c = gf.components.straight(decorator=partial(add_marker_layer, marker_layer=...))`
 
     Args:
         marker_layer: The marker layer.
         marker_label: An optional text label to add to the marker layer.
         flatten: Whether to flatten the component. Should be done only for elementary components.
 
-    Keyword Args:
-        **kwargs: Keyword arguments provided to ``component``.
-
     Returns:
         Same component with marker layer applied.
     """