It’s unfortunate that the developers did not include the option to describe items and blocks in Minecraft Pocket Edition. However, it’s great that there is a mod called An Anvil That Can Name Items In New Lines.
How to Use the An Anvil That Can Name Items In New Lines Mod
To ensure that the mod functions properly, navigate to the settings (global!) of Minecraft PE and enable it. A crucial point to note: if you plan to use it alongside other mods or large maps, make sure to move the Item Editing Anvil (An Anvil That Can Name Items In New Lines) to the top. Now, take any item from Minecraft Bedrock Edition, approach the smithing table, and in the window that appears, type in the text, just like you would with this paper.
The functionality of the mod is similar whether you’re playing on a PC or a mobile device. You can modify the weapon descriptions in MCPE.
Or even from the spawn egg, or tags.