from typing import Dict, Any, Optional, List


def automate_dataset_downloads(
    sources: List[str],
    destination_dir: str,
    schedule: str = "0 */6 * * *",
    auth_env_vars: Optional[dict] = None
) -> Dict[str, Any]:
    """
    Automate Dataset Downloads from APIs (placeholder intent)

    schedule default: every 6 hours.
    """
    return {
        "type": "automation_dataset_downloads",
        "sources": sources,
        "destination_dir": destination_dir,
        "schedule": schedule,
        "auth_env_vars": auth_env_vars or {},
        "preview": {"will_download": True, "count_sources": len(sources)},
    }
