fix(llm): make to_responses_fnc_ctx.provider_tool_type optional

livekit-agents/livekit/agents/llm/_provider_format/openai.py

@@ -222,7 +222,7 @@ def to_responses_fnc_ctx(
     tool_ctx: llm.ToolContext,
     *,
     strict: bool = True,
-    provider_tool_type: type[llm.ProviderTool],
+    provider_tool_type: type[llm.ProviderTool] | None = None,
 ) -> list[dict[str, Any]]:
     schemas: list[dict[str, Any]] = []
     for tool in tool_ctx.flatten():
@@ -233,7 +233,11 @@ def to_responses_fnc_ctx(
         elif isinstance(tool, llm.FunctionTool):
             schema = llm.utils.build_legacy_openai_schema(tool, internally_tagged=True)
             schemas.append(schema)
-        elif isinstance(tool, provider_tool_type) and hasattr(tool, "to_dict"):
+        elif (
+            provider_tool_type is not None
+            and isinstance(tool, provider_tool_type)
+            and hasattr(tool, "to_dict")
+        ):
             schemas.append(tool.to_dict())
 
     return schemas

livekit-agents/livekit/agents/llm/tool_context.py

@@ -517,7 +517,7 @@ def parse_function_tools(
         format: Literal["openai.responses"],
         *,
         strict: bool = True,
-        provider_tool_type: type[ProviderTool],
+        provider_tool_type: type[ProviderTool] | None = None,
     ) -> list[dict[str, Any]]: ...
 
     @overload