Use this when the user provides an image URL, wants to find visually similar products, or needs to refine a previous URL/image search with text criteria (like "in black" or "cheaper"). Also use this for all refinements after URL or image searches.

Use this when the user provides a text description, keywords, or wants to search for products by name. Use this for initial text-based searches and refinements of text-only searches.

Use this when the user provides a product page URL and wants to find alternatives or similar products. This extracts product details from the URL and searches for matching or cheaper alternatives.