Composer99
Hero
Personally, I'm all for trimming down spell descriptions as long as you can convey the same amount of information, or if any information is lost, it's stuff you don't mind losing.
I'm not quite convinced the proposed definition of knock in the OP is quite up to snuff, especially since it does actually reduce the spell's effectiveness (you can no longer end any securement or fastening other than locks with the spell). Personally, I'd also rather that categories of sound be defined separately in the rules so that you can say in spell descriptions that the spell "creates a loud sound" and everyone knows or can easily know what that means without the DM having to make it up on the spot - which also reduces the spell wordcount.
Something a bit more like...
(If you don't want to have defined sound categories, than you add a few words to indicate the audible range of the knock - to my mind, it should be unambiguous to the players that casting this spell risks inviting any nearby creatures to investigate the noise, which the word "loudly" by itself does not do (IMO) - unless, of course, "loudly" is a defined keyword.)
I'm not quite convinced the proposed definition of knock in the OP is quite up to snuff, especially since it does actually reduce the spell's effectiveness (you can no longer end any securement or fastening other than locks with the spell). Personally, I'd also rather that categories of sound be defined separately in the rules so that you can say in spell descriptions that the spell "creates a loud sound" and everyone knows or can easily know what that means without the DM having to make it up on the spot - which also reduces the spell wordcount.
Something a bit more like...
That's ~73 words (knocking a full ~60 off the 5e spell description), and, as I read it, it allows you to everything you could do with 5e knock, and insofar as there is any "ask your DM" element to the spell, it provides (IMO) clear guidance as to what ought to be affected. A lock on a door, for instance, is clearly and unambiguously a "one thing that is locking, barring, or otherwise securing the target against being opened", and so is, say, an iron spike holding that door shut, while, say, the strap keeping your backpack secured to your person - or an iron spike keeping the door open! - is not.Knock (2nd-level transmutation)
Cast 1 action; Components V,S; Instantaneous
Choose an object you can see within 60 feet of you. This spell either suppresses the effect of an arcane lock affecting the target for 10 minutes, or instantly unlocks, unbars, or unfastens any one thing that is locking, barring, or otherwise securing the target against being opened. The target emits a loud (page ##) knocking sound when the spell is cast upon it.
(If you don't want to have defined sound categories, than you add a few words to indicate the audible range of the knock - to my mind, it should be unambiguous to the players that casting this spell risks inviting any nearby creatures to investigate the noise, which the word "loudly" by itself does not do (IMO) - unless, of course, "loudly" is a defined keyword.)