Clandestine Meddler 

Creature — Vampire Rogue
$0.06 #24596 0.07 2.6 years
When this creature enters, suspect up to one other target creature you control. (A suspected creature has menace and can't block.)
Whenever one or more suspected creatures you control attack, surveil 1. (Look at the top card of your library. You may put it into your graveyard.)
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Cards similar to Clandestine Meddler expected a card that isn't here?
Reports become test cases the matcher is graded against before an update ships. Delvefall isn't a chatbot guessing, it compares the printed rules text of every card with plain math, and examples like yours decide which differences should count.
Rune-Brand Juggler89%
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"When this creature enters, suspect up to one target creature you control."
Frantic Scapegoat84%
$0.16↑#15442↑0.27↑2.6 years
"When this creature enters, suspect it."
+1 more matching line
Agrus Kos, Spirit of Justice82%
$0.28↑#11903↑0.002.6 years
"Whenever this card enters or attacks, choose up to one target creature. If it's suspected, exile it. Otherwise, suspect it."
J. Jonah Jameson81%
$0.28↑#9177↑0.53↑1.7 years
"When this card enters, suspect up to one target creature."
+1 more matching line
Dinotomaton80%
$0.14↑#18143↑0.50↑2.8 years
"When this creature enters, target creature you control gains menace until end of turn."
Hot Pursuit78%
$0.35↑#6327↑0.042.6 years
"When this enchantment enters, suspect target creature an opponent controls. As long as this enchantment remains on the battlefield, that creature is also goaded."
Grim Javelineer76%
$0.05↓#266020.23↑1.6 years↓
"Whenever you attack, target attacking creature gets +1/+0 until end of turn. When that creature dies this turn, surveil 1."
Nelly Borca, Impulsive Accuser75%
$0.34↑#4840↑0.70↑2.6 years
"Whenever this card attacks, suspect target creature. Then goad all suspected creatures."