The phrase "tool designed to" is correct and usable in written English.
You can use it when you want to introduce a tool or tool-like solution for something. For example: "We have developed a tool designed to help students with their course work."
A review is a practical tool designed to help people choose a show.
MoneySavingExpert.com offers a free tool designed to help you stop spending more than you earn.
He had developed a psychological profiling tool designed to reveal a person's "unique needs, desires and probable behavioral responses".
The idea led to Codecademy, an online tool designed to give computer science newbies a crash course in the basics.
Nasal swabbing isn't a determination of whether you have an anthrax infection, it's an epidemiological tool designed to determine the perimeter of the exposure".
One other source of advice on insulation is T-Zero, a web-based tool designed to help homeowners learn what green improvements they can make to their house.
A Higg tool designed to measure a product's footprint – information such as the raw materials and energy used that might interest consumers – won't be completed until next year.
In addition, the report noted that the BBC is developing a new audience measurement tool designed to allow detailed analysis of audience usage across all services.
To that end, WAM developed an online tool designed to help Twitter users report harassment — "gendered harassment," in particular, but also other kinds, including "racist" and "transphobic" harassment.
They activated the prototype of The Clock of the Long Now, the tool designed to measure the next 10,000 years and beyond.
Real-life attempts to limit language can often seem to resemble Orwell's fictional tongue Newspeak — in essence a mind-control tool designed to restrict free thinking.
