diff --git a/libs/core/langchain_core/tools.py b/libs/core/langchain_core/tools.py
index eed3e084dd..7ad7da84f3 100644
--- a/libs/core/langchain_core/tools.py
+++ b/libs/core/langchain_core/tools.py
@@ -210,9 +210,9 @@ class ChildTool(BaseTool):
     You can use these to eg identify a specific instance of a tool with its use case.
     """
 
-    handle_tool_error: Optional[Union[bool, str, Callable[[ToolException], str]]] = (
-        False
-    )
+    handle_tool_error: Optional[
+        Union[bool, str, Callable[[ToolException], str]]
+    ] = False
     """Handle the content of the ToolException thrown."""
 
     handle_validation_error: Optional[
@@ -838,7 +838,7 @@ class StructuredTool(BaseTool):
         # Description example:
         # search_api(query: str) - Searches the API for the query.
         sig = signature(source_function)
-        description = f"{name}{sig} - {description_.strip()}"
+        description_ = f"{name}{sig} - {description_.strip()}"
         _args_schema = args_schema
         if _args_schema is None and infer_schema:
             # schema name is appended within function
diff --git a/libs/core/tests/unit_tests/test_tools.py b/libs/core/tests/unit_tests/test_tools.py
index a424d6ecf6..f17e77fa01 100644
--- a/libs/core/tests/unit_tests/test_tools.py
+++ b/libs/core/tests/unit_tests/test_tools.py
@@ -3,6 +3,7 @@
 import asyncio
 import json
 import sys
+import textwrap
 from datetime import datetime
 from enum import Enum
 from functools import partial
@@ -333,7 +334,7 @@ def test_structured_tool_from_function_docstring() -> None:
 
     prefix = "foo(bar: int, baz: str) -> str - "
     assert foo.__doc__ is not None
-    assert structured_tool.description == prefix + foo.__doc__.strip()
+    assert structured_tool.description == prefix + textwrap.dedent(foo.__doc__.strip())
 
 
 def test_structured_tool_from_function_docstring_complex_args() -> None:
@@ -366,7 +367,7 @@ def test_structured_tool_from_function_docstring_complex_args() -> None:
 
     prefix = "foo(bar: int, baz: List[str]) -> str - "
     assert foo.__doc__ is not None
-    assert structured_tool.description == prefix + foo.__doc__.strip()
+    assert structured_tool.description == prefix + textwrap.dedent(foo.__doc__).strip()
 
 
 def test_structured_tool_lambda_multi_args_schema() -> None:
@@ -701,7 +702,7 @@ def test_structured_tool_from_function() -> None:
 
     prefix = "foo(bar: int, baz: str) -> str - "
     assert foo.__doc__ is not None
-    assert structured_tool.description == prefix + foo.__doc__.strip()
+    assert structured_tool.description == prefix + textwrap.dedent(foo.__doc__.strip())
 
 
 def test_validation_error_handling_bool() -> None: