mates, I have one more question, can I check relation inside of caveat, schema example

user should have access to create an appointment only in city that he has access to, some users can have access to all cities

example:

definition smile2impress/employee {}

definition smile2impress/role {
    relation member: smile2impress/employee
}

definition smile2impress/organization {    
    // appoitments management
    relation appointment_creator: smile2impress/role#member

    permission create_appointment = appointment_creator

    // locations management
    relation all_cities_accessor: smile2impress/employee

    permission access_all_cities = all_cities_accessor
}

definition smile2impress/city {
    relation organization: smile2impress/organization
    relation employee: smile2impress/employee
    
    permission access = employee + organization->all_cities_accessor
}

with this schema - I can check whether employee role allows to make an appointment - I can check whether employee has access to city how to combine this two checks into one inside of caveat ? or I should do it somehow differently