The phrase "rudimentary tools" refers to simple and basic equipment or instruments that are basic in design and functionality. They are not advanced or highly developed, but rather, fundamental tools that serve basic purposes. Full definition
Instead, the found object quality of these works draws on histories and practices in painting such as abstract minimalism of the 60s and 70s, quietly positioning an apparent similarity to these real world objects which are rudimentary tools for identification. (julianschnabel.com)
They're like carpenters who choose to work with rudimentary tools instead of precision instruments. (lawyerist.com)
The Teop people were selected to test Grimalda's theories on human cooperation for the small size of their communities (populations of around 50 inhabitants) and low levels of social complexity, though also because they present very different characteristics to those found in Western societies: they are horticulturists and gatherers; they use rudimentary tools to grow their food; they have no mechanised industry; and retribution for manual labour is infrequent. (sciencedaily.com)