"Intercept" targets the Tribute Summoned monster.
If the Tribute Summoned monster has an effect that activates when it is Tribute Summoned, the player that Tribute Summoned the monster activates its effect. "Intercept" is chained to the monster's effect.
"Intercept" cannot be activated when "Jinzo" is Tribute Summoned, because the effect of "Jinzo" is already applied and prevents Trap Cards from being activated.