If you read at least 3 paragraphs in, you'll see that this tool attempts to generate a query using an LLM. Dismissing a tool before attempting to understand it is astounding.
A tool that returns SQL from human language sounds great, but not one that runs the query unchecked. I speak four (human) languages, and sometimes I'll mistranslate something. Not to mention that this tool won't even bubble up the first two syntax errors that it generates - not very confidence inspiring.
The tool seems to show you the query that it executed, so people that do speak SQL can easily check it.
I do find it much easier to read/validate than to write though, which makes it an excellent application for LLM usage, in my experience.
Same applies for JavaScript and Python and Bash and AppleScript and Go and jq and dozens of other programming languages.
If you're going to use LLMs as a productivity boost you need to get good at quickly verifying that they've done the right thing. Effectively that means investing more in QA skills and habits, which is generally valuable anyway.
So why use an LLM when you can use sql queries directly and know the query is correct?