Historically, many force fields used atom types, a form of indirect chemical perception, where all atom types were generated by hand by an expert. As discussed in the Introduction, the complexity of these atom types has been a major contributor to the difficulty of force field development and a barrier to crosscomparing force fields. The new SMIRNOFF format, with direct chemical perception, is an important step forward, but as currently implemented still uses hand-encoded SMIRKS patterns to assign parameters. In order to automate force field development, the generation of these SMIRKS patterns must be done automatically. SMARTY and SMIRKY are able to generate SMARTS and SMIRKS with comparable chemical complexity to parm99/parm@Frosst and smirnoff99Frosst. These tools are a promising first step to determining chemical perception for general force fields without relying on human expertise.