The phrase "a significant tool in" is correct and usable in written English.
You can use it when discussing something that plays an important role or function in a particular context or field.
Example: "The new software has proven to be a significant tool in improving our team's productivity."
Alternatives: "an essential resource in" or "a valuable asset in".
Fast forward to today, and the drug has evolved into a significant tool in oncologists' toolkit.
Decision making is a significant tool in water resources management applications.
The particular method can provide a significant tool in experimental mechanics and fatigue of composites as well as composite assemblies.
Viewed now, it's clear that Fahrenheit 9/11 is, in anything, a precursor of WikiLeaks and the first sign that digital technology would be a significant tool in the fight for democracy.
Optimization is treated as a significant tool in engineering for determining the best, or optimal, value for the decision variable(s) of a system.
Furthermore, the analysis of variance (ANOVA) was implemented as a significant tool in order to evaluate the accuracy of the model.
Social media has been a significant tool for activists in the Middle East.
In short, nuclear testing is not a significant tool for maintaining confidence in the United States' enduring stockpile of nuclear weapons.
Work site health promotion and job exposure dependent exercise training is thus contemporarily recognized as a significant tool for health improvement in the workforce and thereby also in benefit of the company.
Furthermore, the results indicate that the proposed architectural design can prove to be a significant tool for SENSE reconstruction in modern MRI scanners and its low power consumption feature can be remarkable for portable MRI scanners.
Section 5 of the 1965 Voting Rights Act, which requires areas with a history of discrimination to pre-clear any electoral changes with the Justice Department, remains a significant tool to prevent abuses in areas spread across 15 states, and it should be upheld by the court.
