diff --git a/api/core/tools/api_tool/__init__.py b/api/core/tools/api_tool/__init__.py
deleted file mode 100644
index fb268d7a13b..00000000000
--- a/api/core/tools/api_tool/__init__.py
+++ /dev/null
@@ -1 +0,0 @@
-"""Native custom API Tool definition ownership."""
diff --git a/api/core/tools/api_tool/definition_binding.py b/api/core/tools/custom_tool/definition_binding.py
similarity index 100%
rename from api/core/tools/api_tool/definition_binding.py
rename to api/core/tools/custom_tool/definition_binding.py
diff --git a/api/core/tools/tool_manager.py b/api/core/tools/tool_manager.py
index 551f7f2c3d0..0faf6a57201 100644
--- a/api/core/tools/tool_manager.py
+++ b/api/core/tools/tool_manager.py
@@ -1204,7 +1204,7 @@ class ToolManager:
 
         selected_bundle = None
         if expected_binding is not None:
-            from core.tools.api_tool.definition_binding import admit_api_definition
+            from core.tools.custom_tool.definition_binding import admit_api_definition
 
             selected_bundle = admit_api_definition(provider, action, expected_binding)
 
diff --git a/api/services/dify_builder/api_tool_effects.py b/api/services/dify_builder/api_tool_effects.py
index d3b02f298f7..422faa1782a 100644
--- a/api/services/dify_builder/api_tool_effects.py
+++ b/api/services/dify_builder/api_tool_effects.py
@@ -11,7 +11,7 @@ from typing import Any
 from sqlalchemy import select
 from sqlalchemy.orm import Session
 
-from core.tools.api_tool.definition_binding import admit_api_definition, api_definition, provider_definition
+from core.tools.custom_tool.definition_binding import admit_api_definition, api_definition, provider_definition
 from models.tools import ApiToolProvider
 
 __all__ = ["admit_api_definition", "api_definition", "is_api_tool", "owned_api_definitions", "provider_definition"]