Update notes on converter page

Author: kennytv

docs/misc/tools/item-command-converter.mdx

@@ -6,11 +6,13 @@ import ItemCommandConverter from "@site/src/components/ItemCommandConverter";
 
 # Item Command Converter
 
-In 1.20.5, Mojang has changed the way items work. When before they stored all their metadata in
-unstructured NBT, they now utilize so-called item components.
+In 1.20.5, Mojang has moved from unstructured NBT to the so-called item components. While Minecraft
+will automatically update all existing items for you, only Paper will update commands and text
+components containing items where possible. This tool helps you convert old item commands to the
+new format externally.
 
 
-While Minecraft will automatically update all existing items for you, they don't update commands.
-This tool helps you convert old item commands to the new format.
+Note that you need to select the *Entity Argument* mode if you want to convert entity data outside of
+the summon command, as we require the entity type to convert data correctly.
 
 <ItemCommandConverter />