The item description in /dt and the teambuilder are fine as is, however, I would appreciate if https://dex.pokemonshowdown.com/items/covertcloak mentioned that this item also blocks Poison Touch and Toxic Chain from activating against a pokemon holding a Covert Cloak since that isn't an intuitive interaction. Overall this is a very minor suggestion but dex.pokemonshowdown does list a lot of other niche interactions for items, abilities, and moves and this one is fairly notable and can be relevant in competitive play while not being one that people would automatically assume is true so I would love for this to be clarified there if nowhere else.