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Since this unconditionally run the queries returned by a LLM, any safeguards against LLM issuing DELETE commands.

If you look at the source, you'll see that it opens the DB in read-only mode.

There are also some SQL parsing libraries for python that you can use to restrict things further. But opening the DB in RO mode is a good start.

Another concern with tools like this is query performance and not accidentally overloading your database with some stupidly expensive query.