Get the full detail of one or more tours or activities on GuruWalk in a single call. Pass an `items` array — each entry has its own type, product_id and language, and is processed independently. Returns a `results` array where every entry echoes its `product_id` and `type` so you can match each response to its request. Always batch when you need details for several tours (e.g. before recommending or comparing them): send them all in one call instead of invoking this tool several times. Each successful entry returns description, itinerary/highlights, images, reviews, pricing, duration, available languages, cancellation policies, guide name (free tours), and meeting point info. Meeting point shape differs by type: paid `product` returns the address text plus coordinates in `where`; `free_tour` returns ONLY a Google Maps URL in `meeting_point_url` (no text address) plus `how_to_find_me` to identify the guide. Per-item errors (product not found) are reported inside that item's result without failing the rest of the batch. Use this tool whenever the traveler asks what a tour covers, which places it visits, its itinerary, route, description, meeting point, duration, or any content-related question. Always call this tool BEFORE answering questions about a specific tour — never give generic opinions or advice without consulting the real data first.