As many pointed out at the time, it could not tell countries what to do; it could not end the fossil-fuel age by fiat; it could not draw back the seas, placate the winds or dim the noonday sun.
But it could at least lay down the law for subsequent cops, decreeing that this year’s should see the first “global stocktake” of what had and had not been done to bring the agreement’s overarching goals closer.