chore: add license headers

src/tools/__init__.py

@@ -1,3 +1,6 @@
+# Copyright (c) 2025 Bytedance Ltd. and/or its affiliates
+# SPDX-License-Identifier: MIT
+
 from .crawl import crawl_tool
 from .python_repl import python_repl_tool
 from .search import (

src/tools/crawl.py

@@ -1,3 +1,6 @@
+# Copyright (c) 2025 Bytedance Ltd. and/or its affiliates
+# SPDX-License-Identifier: MIT
+
 import logging
 from typing import Annotated
 

src/tools/decorators.py

@@ -1,3 +1,6 @@
+# Copyright (c) 2025 Bytedance Ltd. and/or its affiliates
+# SPDX-License-Identifier: MIT
+
 import logging
 import functools
 from typing import Any, Callable, Type, TypeVar

src/tools/python_repl.py

@@ -1,3 +1,6 @@
+# Copyright (c) 2025 Bytedance Ltd. and/or its affiliates
+# SPDX-License-Identifier: MIT
+
 import logging
 from typing import Annotated
 from langchain_core.tools import tool

src/tools/search.py

@@ -1,3 +1,6 @@
+# Copyright (c) 2025 Bytedance Ltd. and/or its affiliates
+# SPDX-License-Identifier: MIT
+
 import logging
 import os
 from langchain_community.tools.tavily_search import TavilySearchResults