Miraculous tools or Miraculous weapons are special tools that come with Miraculouses. Whenever a Miraculous holder transforms, they possess a tool specific to whichever Miraculous they have.
For the sake of seeing and communicating with kwamis, a mage in ancient times created the Miraculouses, magic jewels. At the same time of making Miraculouses, the mage created tools to go with each Miraculous.
Each tool is a different object, like Ladybug's yo-yo and Cat Noir's staff. There are many types of tools, including toys, musical instruments, and weapons. Usually, the tool is a size that can easily be carried by hand, and some tools can be worn when they aren't in use, such as Ladybug wrapping her yo-yo around her hips or Cat Noir having his staff attached to his back.
Many of the tools are used as weapons, being handy for offense and defense. The tools are almost indestructible, it takes a powerful or magical force, like Simon Says' command card, to break them. Some of them are capable as means of transportation, like when Ladybug can swing from place to place with her yo-yo and Cat Noir can vault himself with his staff. Tools can also have technological features to them, including a phone, a GPS, and a search engine. Every individual Miraculous tool has the capability of communication. The features of the Miraculous tools "update" in accordance with the technologies of the time. It is unknown if all the tools work the same it has been shown that Ladybug’s yo-yo and Cat Noir’s staff can be used as a breathing device.
For some Miraculous holders, they need the tool to use their superpowers. For example, Ladybug tosses the yo-yo into the air whenever she utilises Lucky Charm. Rena Rouge plays her flute to create illusions. Carapace holds up his shield to engage Shellter. Queen Bee spins her spinning top and catches it to use Venom.
When Théo Barbot and Chloé Bourgeois get akumatized into copies of Cat Noir and Ladybug respectively, they possess identical versions of the original superheroes' tools with the same features.
Lila Rossi's akumatization into a replica of a Fox Miraculous holder includes her possessing a copy of the flute.
The real flute in "Sapotis" has the same abilities as Volpina's flute, but Rena Rouge's flute can only create one illusion as opposed to Volpina's many illusions. After the flute has been used once, the Fox Miraculous starts to time out, but Volpina's Miraculous doesn't.
Miraculous tools can also be destroyed by Cat Noir's Cataclysm, as seen in "Mayura".
Also hinted in "Mayura", Ladybug wanted to used Hawk Moth's cane to track him implying that Miraculous tools can be used to find their owners when lost, although Hawk Moth destransforms before they can.