Please help me create an event to spawn in a standard AI empire

[Spy01]

My current event is: (just the important parts)

create_species = {
name = random
class = random
name_list = random
portrait = random
traits = random
homeworld = planet
}

create_country = {
name = random
type = default
species = last_created_species
name_list = random
flag = random
}
set_surveyed = {
surveyed = yes
surveyor = last_created_country
}

set_owner = last_created_country
set_capital = yes
while = {
count = 6
create_pop = {
species = last_created_species
}
}
add_building = building_capital
add_building = building_research_lab_1
add_building = building_foundry_1
add_building = building_factory_1
add_district = district_generator
add_district = district_generator
add_district = district_mining
add_district = district_mining
add_district = district_city
add_district = district_city

solar_system = {
create_starbase = {
size = starbase_starport
module = shipyard
owner = last_created_country
}

It seems to sort of work, but I have no idea if I am missing anything important. Maybe habitability of their home world? Don't know how I would add that.