start_date: Optional[str] = Field(
default=None,
description='Filters search results to include only content published on or after this date.\n \n Use this parameter when you need to:\n - Find recent developments or updates on a topic\n - Exclude outdated information from search results\n - Focus on content within a specific timeframe\n - Combine with end_date to create a custom date range\n \n Format must be YYYY-MM-DD (e.g., "2024-01-15" for January 15, 2024).\n \n Examples:\n - "2024-01-01" - Results from January 1,
2024 onwards\n - "2023-12-25" - Results from December 25,
2023 onwards\n \n When combined with end_date,
creates a precise date range filter.\n \n Default is None (no start date restriction).\n '
)