Function _normalize_result

python/copilot/tools.py:282–322

Convert any return value to a ToolResult. - None returns empty success - Strings pass through directly - ToolResult passes through - Everything else gets JSON-serialized (with Pydantic support)

(result: Any)

def _normalize_result(result: Any) -> ToolResult:
    """
    Convert any return value to a ToolResult.

    - None returns empty success
    - Strings pass through directly
    - ToolResult passes through
    - Everything else gets JSON-serialized (with Pydantic support)
    """
    if result is None:
        return ToolResult(
            text_result_for_llm="",
            result_type="success",
        )

    # ToolResult dataclass passes through directly
    if isinstance(result, ToolResult):
        return result

    # Strings pass through directly
    if isinstance(result, str):
        return ToolResult(
            text_result_for_llm=result,
            result_type="success",
        )

    # Everything else gets JSON-serialized (with Pydantic model support)
    def default(obj: Any) -> Any:
        if isinstance(obj, BaseModel):
            return obj.model_dump()
        raise TypeError(f"Object of type {type(obj).__name__} is not JSON serializable")

    try:
        json_str = json.dumps(result, default=default)
    except (TypeError, ValueError) as exc:
        raise TypeError(f"Failed to serialize tool result: {exc}") from exc

    return ToolResult(
        text_result_for_llm=json_str,
        result_type="success",
    )


def convert_mcp_call_tool_result(call_result: dict[str, Any]) -> ToolResult: