Many artists source their models from external 3D warehouses such as 3dsky.org. Unless and until the architects are very specific about what type of furniture model is needed the artist will not be able to get the same from 3D Sky. There are more than 50000 models available on 3dsky so it will be very overwhelming for the artist to finalize which model the architect needs.

On the hindsight it also becomes difficult for the architect to source the same because the architect is busy managing multiple projects & their studio.

To solve this the architect can alternatively give the name of the furniture or brand name of the furniture which will enable the artist to easily download the model from 3dsky website. If you don't remember the name of the manufacturer, running a Google image search with a reference image of the furniture/model, will give you the complete name and the manufacturer/model and where it's available on 3dsky.com. Download the same and share it with the artist.