BerriAI/litellm · error · OCIError

Invalid tool_choice for OCI: unsupported type {raw_type!r};

Error message

Invalid tool_choice for OCI: unsupported type {raw_type!r}; expected one of 'FUNCTION', 'AUTO', 'NONE', 'REQUIRED'

What it means

Error "Invalid tool_choice for OCI: unsupported type {raw_type!r}; expected one of 'FUNCTION', 'AUTO', 'NONE', 'REQUIRED'" thrown in BerriAI/litellm.

Source

Thrown at litellm/llms/oci/chat/transformation.py:170

        if not isinstance(raw_type, str):
            raise OCIError(
                status_code=400,
                message=f"Invalid tool_choice for OCI: missing or non-string 'type' in {tc!r}",
            )
        upper: Final = raw_type.upper()
        if upper == "FUNCTION":
            fn: Final = tc.get("function")
            name: Final = fn.get("name") if isinstance(fn, dict) else tc.get("name")
            if not (isinstance(name, str) and name):
                raise OCIError(
                    status_code=400,
                    message="Invalid tool_choice for OCI: 'FUNCTION' type requires a non-empty function name",
                )
            selected_params["toolChoice"] = {"type": "FUNCTION", "name": name}
        elif upper in {"AUTO", "NONE", "REQUIRED"}:
            selected_params["toolChoice"] = {"type": upper}
        else:
            raise OCIError(
                status_code=400,
                message=(
                    f"Invalid tool_choice for OCI: unsupported type {raw_type!r}; "
                    "expected one of 'FUNCTION', 'AUTO', 'NONE', 'REQUIRED'"
                ),
            )
        return
    raise OCIError(
        status_code=400,
        message=(f"Invalid tool_choice for OCI: expected str or dict, got {type(tc).__name__}"),
    )


def _normalize_response_format(selected_params: dict, vendor: OCIVendors) -> None:
    rf: Final = selected_params.get("responseFormat")
    if not isinstance(rf, dict) or "type" not in rf:
        return

View on GitHub (pinned to 6c2dcb801b)

Solutions

1. Use tool_choice type 'FUNCTION', 'AUTO', 'NONE', or 'REQUIRED'.

When it happens

Trigger: Thrown at litellm/llms/oci/chat/transformation.py:170 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of BerriAI/litellm@6c2dcb801b (2026-08-15). Data as JSON: /api/errors/669d0033365b9bc9. Report an issue: GitHub.