Does Detect Scrying only work on the caster?

[Rel]

Say you cast Detect Scrying. The spell says that "You immediately become aware of any atempt to observe you by means of Clairaudience/Clairvoyance or Scrying." (Bolding mine)

If somebody Scrys a fellow party member who is within the 120 R area of effect, do you detect it or does it only work if they Scry you personally? The Scrying spell doesn't have an Area (which would presumably be a single creature) but instead has an Effect (Magical Sensor). But the spell then goes on to talk about a specific creature that must be the target of your attempt.

It seems to me that Detect Scrying would alert you if a "magical sensor" appeared anywhere within the area of effect. What do you think?

 

[BSF]

I think I would allow it to detect any magical sensor within range. That allows the spell to be more effective in general. Maximizing party resources for the benefit of everyone seems like a good idea. Otherwise, you end up with situations where people scry the party fighter because it is unlikely that the fighter will detect the attempt.