Only if those words are poorly written.
I'm not saying spell write-ups have to resemble legal documents or M:tG rules, but a few sentences covering some of the more obvious potential issues with some spells would be useful. For example, Polymorph (and its cousin, Druidic shapeshifting) is one that needs a lot of this, unless the intent is that it be game-ruiningly broken. Obviously, Wish is another.
That said, some spells can be written up in a single line. A hypothetical example: "Slay Living. A target living creature within 25 ft saves at DC 20 and dies instantly if this save is failed."