Security seems annoying to track if the opponent is playing multiple Attacks per turn.
Indulgences is very close to turn 1 autoresign territory if you open 2/5 or 3/4 while your opponent opens 4/3 or 5/2, which happens 25% of the time and a separate 25% of the time for the opponent. So basically half the time Indulgences is in the kingdom, one player at random gets to start the game with what's probably an insurmountable advantage.
* Espionage should cost more, maybe $4 and come with a penalty like take your -Card token.
That would make it strictly worse than Borrow.
* Tourism should cost more, maybe $5. At $4 i'd include take your -$1 token.
Tourism for $3 isn't
strictly weaker than Camel Train, because sometimes you don't want the Camel Train itself in your deck and sometimes you don't have time to buy a Gold when you're in a hurry to green instead, but it certainly doesn't compare all that favorably to Camel Train either and Camel Train is a weak card. For $5, it would be like the weakest $5 in the game.