I don't think it's particularly descriptive - it doesn't even talk about the themes. I would never consider this type of commentary spoilery - guest star, lack of gay UST, internal character development for Reid. I could see how theoretically some people might be annoyed to have warning of a recurring guest star's reappearance, but a peripheral one with so little effect on the plot? Certainly there's no information here that would change how anyone reacted to the episode as they were watching it. And then there's the fact that it aired two days ago and doesn't even have an active fandom...