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, images, reviews, duration, available languages, cancellation policies, and meeting point info. Paid `product` entries also return `highlights`, `included`/`excluded`, `pricing_from`, and `where` (address + coordinates). `free_tour` entries return `itinerary` as a flat array of point-title strings (no descriptions), plus `guide.name`, `meeting_point_url`, and `how_to_find_me`. Meeting point shape differs by type: paid `product` returns the address text plus coordinates in `where`; `free_tour` returns `meeting_point_url` (Google Maps link), `meeting_point_latitude` and `meeting_point_longitude` (use these coords as destination for routing), plus `how_to_find_me`: a free-text note written by the guide describing how the traveler can recognize them at the meeting point. 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. Supports en, es, de, it; any other value falls back to English. Pass the traveler's language code anyway and translate the answer into their language. Each result includes the tour's url — when recommending or confirming a tour, share it so the traveler can open it to book.