core: make sure tool input keys won't be modified during following pr…

…ocess, to prevent problems when there's no args schema.
langchain-ai · Nov 2, 2024 · 0c436b2 · 0c436b2
1 parent 3b0b7cf
commit 0c436b2
Showing 1 changed file with 2 additions and 0 deletions.
diff --git a/libs/core/langchain_core/tools/base.py b/libs/core/langchain_core/tools/base.py
@@ -528,6 +528,8 @@ def _parse_input(self, tool_input: Union[str, dict]) -> Union[str, dict[str, Any
                     for k, v in result_dict.items()
                     if k in tool_input
                 }
+            # make sure tool input keys won't be modified during following process
+            tool_input.copy()
             return tool_input
 
     @model_validator(mode="before")