What is your idea?

1.21 added the "on_random_loot" tag which states: "Enchantments that can show up on loot in loot chests found in the world".

Mods like Dungeons and Taverns include enchantments not intended to be found randomly, but rather within their respective structures. With "enchant_randomly", it's possible to find Photosynthesis (Which is the equivalent to Mending) inside of a campsite. Swapping to "on_random_loot" would remove enchantments unintended for random loot chests.

Related to another problem or bug

No response

Additional context

No response

Thank you for mentioning that, will definitely add this during the next update.

Note to myself:
It looks like I can pass it as an option to minecraft:enchant_randomly so that it uses only enchantments of that tag.
The loot table would look something like this.

{
    "type": "minecraft:chest",
    "pools": [
        {
            "rolls": 1,
            "entries": [
                {
                    "type": "minecraft:item",
                    "name": "minecraft:diamond_pickaxe",
                    "functions": [
                        {
                            "function": "minecraft:enchant_randomly",
                            "options": "#minecraft:on_random_loot"
                        }
                    ]
                }
            ]
        }
    ]
}