Embrace as Tributary

base = -50
modifier = {
	scope:recipient = {
		government_has_flag = government_is_tribal
	}
	add = 30
	desc = recipient_is_a_tribal_government
}
modifier = {
	scope:recipient = {
		is_confederation_member = yes
	}
	add = -50
	desc = recipient_is_in_a_confederation
}
modifier = {
	scope:actor = {
		has_unruined_mandala_capital_trigger = yes
	}
	add = {
		value = scope:actor.mandala_radiance_value
		multiply = 2
	}
	desc = actor_positive_mandala_radiance
}
modifier = {
	trigger_if = {
		limit = {
			scope:actor = {
				has_unruined_mandala_capital_trigger = yes
			}
			scope:recipient = {
				is_tributary = no
				OR = {
					government_has_flag = government_is_mandala
					government_has_flag = government_is_tribal
				}
			}
		}
		scope:recipient = {
			OR = {
				any_neighboring_top_liege_realm_owner = {
					has_unruined_mandala_capital_trigger = yes
					government_has_flag = government_is_mandala
					NOR = {
						this = scope:actor
						this = scope:recipient
					}
					save_temporary_scope_as = suzerain_comparison
				}
				any_neighboring_top_suzerain_realm_owner ?= {
					has_unruined_mandala_capital_trigger = yes
					government_has_flag = government_is_mandala
					NOR = {
						this = scope:actor
						this = scope:recipient
					}
					save_temporary_scope_as = suzerain_comparison
				}
			}
		}
		always = yes
	}
	trigger_else = {
		always = no
	}
	add = {
		value = {
			value = scope:suzerain_comparison.mandala_radiance_value
			multiply = 2
		}
		multiply = -1
	}
	desc = other_devaraja_radiance
}
modifier = {
	trigger_if = {
		limit = {
			scope:recipient = {
				is_tributary = yes
				overlord = {
					government_has_flag = government_is_mandala
					has_unruined_mandala_capital_trigger = yes
					mandala_radiance_value > 0
				}
			}
			scope:actor = {
				has_unruined_mandala_capital_trigger = yes
			}
		}
		always = yes
	}
	trigger_else = {
		always = no
	}
	add = {
		value = {
			value = scope:recipient.overlord.mandala_radiance_value
			multiply = 2
		}
		multiply = -1
	}
	desc = devaraja_overlord_radiance
}
modifier = {
	desc = is_prosperity_mandala_tributary
	scope:recipient = {
		is_tributary = yes
		suzerain = {
			has_realm_law_flag = tributaries_less_likely_to_break_free
		}
	}
	add = 15
}
modifier = {
	desc = tgp_sea_legacy_2_modifier_desc
	scope:actor = {
		dynasty ?= {
			has_dynasty_perk = tgp_sea_legacy_2
		}
	}
	add = tgp_sea_legacy_tributary_acceptance_value
}
mandala_devaraja_piety_level_add_weight_modifier = {
	DEVARAJA = scope:actor
}
subject_realm_size_lose_weight_modifier = {
	DEVARAJA = scope:actor
	SUBJECT = scope:recipient
}
ai_military_threat_modifier = {
	SENDER = scope:recipient
	RECEIVER = scope:actor
	MULTIPLIER = 1
}
modifier = {
	desc = tributary_interaction_aibehavior_recipient_capital_complex
	trigger = {
		scope:recipient.capital_province ?= {
			has_building_with_flag = mandala_capital_building
			has_ruined_great_building = no
		}
	}
	add = -200
}
modifier = {
	desc = tributary_interaction_aibehavior_recipient_tier_tt
	trigger = {
		scope:recipient = {
			highest_held_title_tier > scope:actor.highest_held_title_tier
		}
	}
	add = {
		value = scope:recipient.highest_held_title_tier
		subtract = scope:actor.highest_held_title_tier
		multiply = 50
		multiply = -1
	}
}
modifier = {
	desc = embrace_as_tributary_interaction_same_faith
	trigger = {
		scope:actor.faith = scope:recipient.faith
		scope:actor.capital_province = {
			has_building_with_flag = mandala_capital_building
			has_ruined_great_building = no
		}
	}
	add = {
		value = 10
	}
}
modifier = {
	desc = offer_vassalization_interaction_aibehavior_differentfaith_tt
	trigger = {
		NOR = {
			scope:recipient.faith = scope:actor.faith
			scope:recipient.rite = {
				rite_has_doctrine = doctrine_pluralism_pluralistic
			}
		}
	}
	add = {
		value = -25
		if = {
			limit = {
				scope:recipient.faith = {
					faith_hostility_level = {
						target = scope:actor.faith
						value >= faith_hostile_level
					}
				}
			}
			add = -10
		}
		if = {
			limit = {
				scope:recipient.faith = {
					faith_hostility_level = {
						target = scope:actor.faith
						value >= faith_evil_level
					}
				}
			}
			add = -25
		}
	}
}
modifier = {
	desc = embrace_as_tributary_interaction_other_religion_family
	trigger = {
		scope:recipient = {
			NOR = {
				faith = {
					faith_is_in_same_rf = {
						FAITH = scope:actor.faith
					}
				}
				government_has_flag = government_is_wanua
			}
		}
	}
	add = {
		value = -25
		if = {
			limit = {
				government_has_flag = government_is_theocracy
			}
			subtract = 975
		}
	}
}
modifier = {
	desc = embrace_as_tributary_interaction_wrong_government
	scope:recipient = {
		NOR = {
			government_has_flag = government_is_mandala
			government_has_flag = government_is_tribal
		}
	}
	add = {
		value = -50
		if = {
			limit = {
				scope:recipient = {
					OR = {
						government_has_mechanic = administrative
						government_is_japanese_trigger = yes
						government_has_flag = gov
# … (cut here; the rest is in the file)

As written in game/common/character_interactions/00_tributary_interactions.txt.