Here is the link to one of the prompts. It seems like all the LLM tasks are in the agents directory:
https://github.com/microsoft/data-formulator/blob/main/py-sr...
Some of these "agents" are used for surprising things like sorting: https://github.com/microsoft/data-formulator/blob/main/py-sr... [this seems a bit lazy, but I guess it works :D]