diff --git a/api/fields/workflow_fields.py b/api/fields/workflow_fields.py
index 9f1bef3b36..a79753a284 100644
--- a/api/fields/workflow_fields.py
+++ b/api/fields/workflow_fields.py
@@ -1,73 +1,75 @@
-from flask_restful import fields
-
-from core.helper import encrypter
-from core.variables import SecretVariable, SegmentType, Variable
-from fields.member_fields import simple_account_fields
-from libs.helper import TimestampField
-
-ENVIRONMENT_VARIABLE_SUPPORTED_TYPES = (SegmentType.STRING, SegmentType.NUMBER, SegmentType.SECRET)
-
-
-class EnvironmentVariableField(fields.Raw):
-    def format(self, value):
-        # Mask secret variables values in environment_variables
-        if isinstance(value, SecretVariable):
-            return {
-                "id": value.id,
-                "name": value.name,
-                "value": encrypter.obfuscated_token(value.value),
-                "value_type": value.value_type.value,
-            }
-        if isinstance(value, Variable):
-            return {
-                "id": value.id,
-                "name": value.name,
-                "value": value.value,
-                "value_type": value.value_type.value,
-            }
-        if isinstance(value, dict):
-            value_type = value.get("value_type")
-            if value_type not in ENVIRONMENT_VARIABLE_SUPPORTED_TYPES:
-                raise ValueError(f"Unsupported environment variable value type: {value_type}")
-            return value
-
-
-conversation_variable_fields = {
-    "id": fields.String,
-    "name": fields.String,
-    "value_type": fields.String(attribute="value_type.value"),
-    "value": fields.Raw,
-    "description": fields.String,
-}
-
-workflow_fields = {
-    "id": fields.String,
-    "graph": fields.Raw(attribute="graph_dict"),
-    "features": fields.Raw(attribute="features_dict"),
-    "hash": fields.String(attribute="unique_hash"),
-    "version": fields.String,
-    "marked_name": fields.String,
-    "marked_comment": fields.String,
-    "created_by": fields.Nested(simple_account_fields, attribute="created_by_account"),
-    "created_at": TimestampField,
-    "updated_by": fields.Nested(simple_account_fields, attribute="updated_by_account", allow_null=True),
-    "updated_at": TimestampField,
-    "tool_published": fields.Boolean,
-    "environment_variables": fields.List(EnvironmentVariableField()),
-    "conversation_variables": fields.List(fields.Nested(conversation_variable_fields)),
-}
-
-workflow_partial_fields = {
-    "id": fields.String,
-    "created_by": fields.String,
-    "created_at": TimestampField,
-    "updated_by": fields.String,
-    "updated_at": TimestampField,
-}
-
-workflow_pagination_fields = {
-    "items": fields.List(fields.Nested(workflow_fields), attribute="items"),
-    "page": fields.Integer,
-    "limit": fields.Integer(attribute="limit"),
-    "has_more": fields.Boolean(attribute="has_more"),
-}
+from flask_restful import fields
+
+from core.helper import encrypter
+from core.variables import SecretVariable, SegmentType, Variable
+from fields.member_fields import simple_account_fields
+from libs.helper import TimestampField
+
+ENVIRONMENT_VARIABLE_SUPPORTED_TYPES = (SegmentType.STRING, SegmentType.NUMBER, SegmentType.SECRET)
+
+
+class EnvironmentVariableField(fields.Raw):
+    def format(self, value):
+        # Mask secret variables values in environment_variables
+        if isinstance(value, SecretVariable):
+            return {
+                "id": value.id,
+                "name": value.name,
+                "value": encrypter.obfuscated_token(value.value),
+                "value_type": value.value_type.value,
+                "description": value.description,
+            }
+        if isinstance(value, Variable):
+            return {
+                "id": value.id,
+                "name": value.name,
+                "value": value.value,
+                "value_type": value.value_type.value,
+                "description": value.description,
+            }
+        if isinstance(value, dict):
+            value_type = value.get("value_type")
+            if value_type not in ENVIRONMENT_VARIABLE_SUPPORTED_TYPES:
+                raise ValueError(f"Unsupported environment variable value type: {value_type}")
+            return value
+
+
+conversation_variable_fields = {
+    "id": fields.String,
+    "name": fields.String,
+    "value_type": fields.String(attribute="value_type.value"),
+    "value": fields.Raw,
+    "description": fields.String,
+}
+
+workflow_fields = {
+    "id": fields.String,
+    "graph": fields.Raw(attribute="graph_dict"),
+    "features": fields.Raw(attribute="features_dict"),
+    "hash": fields.String(attribute="unique_hash"),
+    "version": fields.String,
+    "marked_name": fields.String,
+    "marked_comment": fields.String,
+    "created_by": fields.Nested(simple_account_fields, attribute="created_by_account"),
+    "created_at": TimestampField,
+    "updated_by": fields.Nested(simple_account_fields, attribute="updated_by_account", allow_null=True),
+    "updated_at": TimestampField,
+    "tool_published": fields.Boolean,
+    "environment_variables": fields.List(EnvironmentVariableField()),
+    "conversation_variables": fields.List(fields.Nested(conversation_variable_fields)),
+}
+
+workflow_partial_fields = {
+    "id": fields.String,
+    "created_by": fields.String,
+    "created_at": TimestampField,
+    "updated_by": fields.String,
+    "updated_at": TimestampField,
+}
+
+workflow_pagination_fields = {
+    "items": fields.List(fields.Nested(workflow_fields), attribute="items"),
+    "page": fields.Integer,
+    "limit": fields.Integer(attribute="limit"),
+    "has_more": fields.Boolean(attribute="has_more"),
+}