Magickal tools are designed to help you focus your energy on to something. Examples of tools that fit that description are the Athame and Wand.
Magickal tools can be something to hold energy in, such as a crystal or amulet.
Tools can be magick-specific, such as Runes for Runic Magick.
Ritual tools are tools designed to be used during rituals, but this is not always the case. Examples would be a bell that is rung to send vibrations through the room and tools used to hold something like a chalice for water.
Books can be tools as well, such as the Book of Shadows, which is a Witch's journal, the Grimore, which is your book of Spells, and your Herbal Grimore, which is your book of herbs and recipes using herbs.
Now, do you always need a tool? Absolutely not. You can perform your magick without tools, and I have here some alternatives you can use.
-Your index finger for the wand.
-Your index finger and your middle finger (ring finger) for the Athame
-A harmless butter knife for the athame (Decorate it!)
-A wine glass for a chalice (Decorate it if you want!)
-You can make Runes out of paper if you wish to, decorate them and shape the paper to what shape you want. You should laminate the paper.
Your Book of Shadows does not have to be those fancy leather books you see. Add your own creativity to it, use anything you want to make one. You can use a binder, notebook or you can even have a electronical Book of Shadows. Creativity is essential here, and you will be happy with your own work!
I hope this was able to help.