Search and download ready-to-print 3D model files (STL/3MF/ZIP) for a concept or specific part by querying Printables (first). Use when an agent needs to find an existing model, capture license/attribution, download the source files, and output a local folder + manifest for quoting/printing.

通过查询 Printables 搜索并下载适用于打印的 3D 模型文件（STL/3MF/ZIP），用于查找现有模型、获取许可与署名信息、下载源文件，并输出本地文件夹及清单以供报价或打印