core[patch]: support bedrock converse -> openai tool (#27754)

libs/core/langchain_core/utils/function_calling.py

@@ -341,8 +341,8 @@ def convert_to_openai_function(
             A dictionary, Pydantic BaseModel class, TypedDict class, a LangChain
             Tool object, or a Python function. If a dictionary is passed in, it is
             assumed to already be a valid OpenAI function, a JSON schema with
-            top-level 'title' and 'description' keys specified, or an Anthropic format
+            top-level 'title' and 'description' keys specified, an Anthropic format
-            tool.
+            tool, or an Amazon Bedrock Converse format tool.
         strict:
             If True, model output is guaranteed to exactly match the JSON Schema
             provided in the function definition. If None, ``strict`` argument will not
@@ -362,6 +362,10 @@ def convert_to_openai_function(
     .. versionchanged:: 0.3.13
 
         Support for Anthropic format tools added.
+
+    .. versionchanged:: 0.3.14
+
+        Support for Amazon Bedrock Converse format tools added.
     """
     from langchain_core.tools import BaseTool
 
@@ -389,6 +393,13 @@ def convert_to_openai_function(
             "description": function["description"],
             "parameters": function["input_schema"],
         }
+    # an Amazon Bedrock Converse format tool
+    elif isinstance(function, dict) and "toolSpec" in function:
+        oai_function = {
+            "name": function["toolSpec"]["name"],
+            "description": function["toolSpec"]["description"],
+            "parameters": function["toolSpec"]["inputSchema"]["json"],
+        }
     elif isinstance(function, type) and is_basemodel_subclass(function):
         oai_function = cast(dict, convert_pydantic_to_openai_function(function))
     elif is_typeddict(function):

libs/core/tests/unit_tests/utils/test_function_calling.py

@@ -230,6 +230,30 @@ def anthropic_tool() -> dict:
     }
 
 
+@pytest.fixture()
+def bedrock_converse_tool() -> dict:
+    return {
+        "toolSpec": {
+            "name": "dummy_function",
+            "description": "dummy function",
+            "inputSchema": {
+                "json": {
+                    "type": "object",
+                    "properties": {
+                        "arg1": {"description": "foo", "type": "integer"},
+                        "arg2": {
+                            "description": "one of 'bar', 'baz'",
+                            "enum": ["bar", "baz"],
+                            "type": "string",
+                        },
+                    },
+                    "required": ["arg1", "arg2"],
+                }
+            },
+        }
+    }
+
+
 class Dummy:
     def dummy_function(self, arg1: int, arg2: Literal["bar", "baz"]) -> None:
         """dummy function
@@ -258,6 +282,7 @@ def test_convert_to_openai_function(
     dummy_tool: BaseTool,
     json_schema: dict,
     anthropic_tool: dict,
+    bedrock_converse_tool: dict,
     annotated_function: Callable,
     dummy_pydantic: type[BaseModel],
     runnable: Runnable,
@@ -290,6 +315,7 @@ def test_convert_to_openai_function(
         dummy_tool,
         json_schema,
         anthropic_tool,
+        bedrock_converse_tool,
         expected,
         Dummy.dummy_function,
         DummyWithClassMethod.dummy_function,