How much would would it be to make a

Anything can be tool, if you wrap it with FunctionTool

Probably, if you expect the outputs to be large, you might want to use the ondemand loader tool
https://docs.llamaindex.ai/en/stable/examples/tools/OnDemandLoaderTool/?h=ondemand

That's actually really cool cause I think I know exactly how I could do this

What's the proper way to test a tool