Today the only way to test a GraphQL query against the Rewst API is to build or open a test workflow, add a Generic GraphQL request action, execute the workflow, and read the result back out of the execution. That is several steps for what is often a one-line change while iterating on a query. GraphQL has no table-style schema to browse, it is class based, so schema discovery is itself trial and error: you frequently need to run a query just to find out what fields or accepted argument values exist. A live GraphQL tool, in the spirit of the existing Live Editor, where you type a query, hit execute, and get the response immediately, would let builders confirm a query is structured correctly before it ever goes into a production workflow. The browser developer console is a partial workaround but adds its own steps. Anyone doing advanced platform work (querying forms and labels, building App Builder pods against platform data) hits this repeatedly.