Artist Tool, as the name suggests, is likely a drawing or graphics program for the NEC PC-FX console. Rather than a traditional game, it's a utility application that would have allowed users to create and manipulate images directly on the PC-FX system.  NEC's development of this tool showcases their attempt to expand the system's functionality beyond just gaming.  Specific features and capabilities are limited in information, but it highlights a unique offering for the PC-FX.

Artist Tool (Japan)

Aoi Blink (Japan) [En by Gaijin+Zatos v0.99b]