Homebrew page to list everything the homebrew does

I've encountered some homebrews that don't actually do what they say they do.

One example: https://www.dndbeyond.com/magic-items/91233-necronomicon-of-the-undead
This item includes text like "grants the power of summoning any number of undead creature".  However, when you equip the item and attune to it, there is no new summon undead ability added to the character sheet.  The item does include 4 spells and 15 charges, none of which are mentioned in the description text.  The only way to discover that those spells are there is to equip and attune to the item.

A second example: https://www.dndbeyond.com/characters/subclasses/3499-arcane-polymath
This is an interesting Wizard subclass, but if you build a character with it on D&D Beyond, the online character sheet doesn't implement any of the features described by the text.

It would be nice if the homebrew page listed all the mechanical things the homebrew does in addition to displaying the description text.  This would make for fewer surprises when the description text does not match what it actually does.  That might look ugly, but that's better then having to go through the whole process of putting it in the character sheet to figure out and reverse engineer what happened.