diff --git a/langfun/core/structured/completion_test.py b/langfun/core/structured/completion_test.py
index 88a87dc..44e4581 100644
--- a/langfun/core/structured/completion_test.py
+++ b/langfun/core/structured/completion_test.py
@@ -30,7 +30,10 @@ class Activity(pg.Object):
 
 class Itinerary(pg.Object):
   day: pg.typing.Int[1, None]
-  type: pg.typing.Enum['daytime', 'nighttime']
+  type: pg.typing.Annotated[
+      pg.typing.Enum['daytime', 'nighttime'],
+      'Type of itinerary.'
+  ]
   activities: list[Activity]
   hotel: pg.typing.Str['.*Hotel'] | None
 
@@ -73,18 +76,21 @@ def test_render_no_examples(self):
                 itineraries=[
                   Itinerary(
                     day=1,
+                    # Type of itinerary.
                     type=MISSING(Literal['daytime', 'nighttime']),
                     activities=MISSING(list[Activity]),
                     hotel=None
                   ),
                   Itinerary(
                     day=2,
+                    # Type of itinerary.
                     type=MISSING(Literal['daytime', 'nighttime']),
                     activities=MISSING(list[Activity]),
                     hotel=None
                   ),
                   Itinerary(
                     day=3,
+                    # Type of itinerary.
                     type=MISSING(Literal['daytime', 'nighttime']),
                     activities=MISSING(list[Activity]),
                     hotel=None
@@ -134,6 +140,7 @@ def test_render_no_class_definitions(self):
                 itineraries=[
                   Itinerary(
                     day=1,
+                    # Type of itinerary.
                     type=MISSING(Literal['daytime', 'nighttime']),
                     activities=[
                       Activity(
@@ -144,6 +151,7 @@ def test_render_no_class_definitions(self):
                   ),
                   Itinerary(
                     day=2,
+                    # Type of itinerary.
                     type=MISSING(Literal['daytime', 'nighttime']),
                     activities=[
                       Activity(
@@ -154,6 +162,7 @@ def test_render_no_class_definitions(self):
                   ),
                   Itinerary(
                     day=3,
+                    # Type of itinerary.
                     type=MISSING(Literal['daytime', 'nighttime']),
                     activities=[
                       Activity(
@@ -238,18 +247,21 @@ class _Date:
                 itineraries=[
                   Itinerary(
                     day=1,
+                    # Type of itinerary.
                     type=MISSING(Literal['daytime', 'nighttime']),
                     activities=MISSING(list[Activity]),
                     hotel=None
                   ),
                   Itinerary(
                     day=2,
+                    # Type of itinerary.
                     type=MISSING(Literal['daytime', 'nighttime']),
                     activities=MISSING(list[Activity]),
                     hotel=None
                   ),
                   Itinerary(
                     day=3,
+                    # Type of itinerary.
                     type=MISSING(Literal['daytime', 'nighttime']),
                     activities=MISSING(list[Activity]),
                     hotel=None
diff --git a/langfun/core/structured/mapping.py b/langfun/core/structured/mapping.py
index 206c0aa..61f932b 100644
--- a/langfun/core/structured/mapping.py
+++ b/langfun/core/structured/mapping.py
@@ -379,7 +379,8 @@ def input_value(self) -> Any:
     return schema_lib.mark_missing(self.message.result)
 
   def value_str(self, value: Any) -> str:
-    return schema_lib.value_repr('python').repr(value, compact=False)
+    return schema_lib.value_repr('python').repr(
+        value, compact=False, verbose=True)
 
   def missing_type_dependencies(self, value: Any) -> list[Type[Any]]:
     value_specs = tuple(
diff --git a/requirements.txt b/requirements.txt
index 0a192cf..56d4057 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,5 +1,5 @@
 jinja2>=3.1.2
 openai==0.27.2
-pyglove>=0.4.4.dev20230926
+pyglove>=0.4.4.dev20231006
 termcolor==1.1.0
 tqdm>=4.64.1
\ No newline at end of file