Most modern "Kill All" methods require a high volume of tools to increase the speed and efficiency of the loop.
This sounds like a blog post targeting the Roblox scripting and exploiting community, specifically regarding "Kill All" scripts. These scripts typically use in-game tools to bypass security and affect other players.
In games with complex character loading, having more tools ensures the script has a constant "anchor" to the other players' humanoids. How to Use the Script
Use a reliable executor to run your .lua script.
Some game anti-cheats track single-tool damage. Using a massive inventory of tools helps bypass these "per-tool" rate limits.