Don't want to speak for them, but why would they want to stop you from writing that tool?
Remember their business model, it isn't "get people to the end of the game following the rules", it's "identify people with talent to recruit". Your tool would just be evidence of the latter.
The only thing we're worried about is people spoiling the challenges for other people (it's not a problem for us if people get help clearing levels, but it's a problem if people find ways to suck all the fun out of it for everyone else).
We like the idea of people publishing and sharing tools; they did for Microcorruption, too. We'll have more to say about this.
Remember their business model, it isn't "get people to the end of the game following the rules", it's "identify people with talent to recruit". Your tool would just be evidence of the latter.