From 54ed031d1a3d20aec92ff92827e0a8a13f74d3e5 Mon Sep 17 00:00:00 2001
From: Google Team Member <genai-sdk-bot@google.com>
Date: Wed, 4 Jun 2025 10:43:03 -0700
Subject: [PATCH] feat: support None as return type, such as def func() ->
 None: None:

PiperOrigin-RevId: 767204150
---
 src/google/adk/tools/_function_parameter_parse_util.py | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/google/adk/tools/_function_parameter_parse_util.py b/src/google/adk/tools/_function_parameter_parse_util.py
index 1c5ed8d..ba1e3c9 100644
--- a/src/google/adk/tools/_function_parameter_parse_util.py
+++ b/src/google/adk/tools/_function_parameter_parse_util.py
@@ -37,6 +37,7 @@ _py_builtin_type_to_schema_type = {
     bool: types.Type.BOOLEAN,
     list: types.Type.ARRAY,
     dict: types.Type.OBJECT,
+    None: types.Type.NULL,
 }
 
 logger = logging.getLogger('google_adk.' + __name__)