diff --git a/libs/core/langchain_core/tools/base.py b/libs/core/langchain_core/tools/base.py
index 7026a2e8fb1..e28cd2290c6 100644
--- a/libs/core/langchain_core/tools/base.py
+++ b/libs/core/langchain_core/tools/base.py
@@ -552,6 +552,7 @@ class ChildTool(BaseTool):
 
     model_config = ConfigDict(
         arbitrary_types_allowed=True,
+        ignored_types=(functools.cached_property,),
     )
 
     @property
@@ -564,7 +565,7 @@ class ChildTool(BaseTool):
         keys = {k for k in self.args if k != "kwargs"}
         return len(keys) == 1
 
-    @property
+    @functools.cached_property
     def args(self) -> dict:
         """Get the tool's input arguments schema.
 
@@ -583,7 +584,7 @@ class ChildTool(BaseTool):
                 json_schema = input_schema.model_json_schema()
         return cast("dict", json_schema["properties"])
 
-    @property
+    @functools.cached_property
     def tool_call_schema(self) -> ArgsSchema:
         """Get the schema for tool calls, excluding injected arguments.