generate_trinket_effect

generate_trinket_effect = {
	$TRINKET_RECEIVER$ = { save_scope_as = trinket_receiver }
	$TRINKET_GIVER$ = { save_scope_as = trinket_giver }
	scope:trinket_receiver = {
		set_variable = {
			name = grab_all_trinkets
			value = flag:$GRAB_ALL_TRINKETS$
		}
	}
	random_list = {
		#BAD
		##Bad 01
		###Gilded Rat's Tail
		80 = {
			#TRIGGERS
			trigger = {
				scope:trinket_receiver = {
					OR = {
						##If we are flagged to grab all trinkets
						var:grab_all_trinkets ?= flag:yes
						##stewardship_general.2001
						###Let's not get trash if we outwitted the merchant
						AND = {
							has_character_flag = used_in_stewardship_general.2001
							NOT = { has_character_flag = free_outcome_stewardship_general.2001 }
						}
						##^^Add more/other trigger flags above^^##
					}
				}
			}
			#MODIFIERS
			##stewardship_general.2001
			###We didn't choose the CHEAP option
			modifier = {
				scope:trinket_receiver = {
					OR = {
						has_character_flag = expensive_option_stewardship_general.2001
						has_character_flag = helpful_option_stewardship_general.2001
					}
				}
				add = -25
			}
			###We have extremely high stewardship skill
			modifier = {
				scope:trinket_receiver = { has_character_flag = has_extremely_high_stewardship_skill_stewardship_general.2001 }
				add = -25
			}
			##^^Add more/other modifier flags above^^##
			#DO NOT edit this part##
			create_artifact = {
				name = gilded_rats_tail
				description = gilded_rats_tail.desc
				type = miscellaneous
				visuals = ring
				modifier = artifact_monthly_prestige_penalty_modifier
				modifier = artifact_child_opinion_1_modifier
				save_scope_as = new_trinket
				wealth = 5
				quality = 5
				max_durability = 10
				generate_history = no
			}
			scope:new_trinket = {
				flag_as_trash_artifact = yes
				#The AI probably shouldn't want this bad trinket
				flag_as_unwanted_artifact = yes
			}
		}
		##Bad 02
		###Quail's Eggshell 'Gem'
		80 = {
			#TRIGGERS
			trigger = {
				scope:trinket_receiver = {
					OR = {
						##If we are flagged to grab all trinkets
						var:grab_all_trinkets ?= flag:yes
						##stewardship_general.2001
						###Let's not get trash if we outwitted the merchant
						AND = {
							has_character_flag = used_in_stewardship_general.2001
							NOT = { has_character_flag = free_outcome_stewardship_general.2001 }
						}
						has_character_flag = used_in_mpo_events_ariana_0070
						##^^Add more/other trigger flags above^^##
					}
				}
			}
			#MODIFIERS
			##stewardship_general.2001
			###We didn't choose the CHEAP option
			modifier = {
				scope:trinket_receiver = {
					OR = {
						has_character_flag = expensive_option_stewardship_general.2001
						has_character_flag = helpful_option_stewardship_general.2001
					}
				}
				add = -25
			}
			###We have extremely high stewardship skill
			modifier = {
				scope:trinket_receiver = { has_character_flag = has_extremely_high_stewardship_skill_stewardship_general.2001 }
				add = -25
			}
			##^^Add more/other modifier flags above^^##
			#DO NOT edit this part##
			create_artifact = {
				name = quail_eggshell_gem
				description = quail_eggshell_gem.desc
				type = miscellaneous
				visuals = diamond
				modifier = artifact_monthly_prestige_penalty_modifier
				modifier = artifact_fertility_gain_1_modifier
				save_scope_as = new_trinket
				wealth = 5
				quality = 5
				max_durability = 10
				generate_history = no
			}

As written in game/common/scripted_effects/00_ep1_artifact_creation_effects.txt.