Enforce conditions on queries

Currently I have a simple schema, a sites table and an items table. Sites own many items, items has a siteId column to store the reference of the site which owns it. I'd like to be able to enforce a condition when querying items, meaning returning an error if it is not queried with a siteId - in practice: - select * from items would fail - select * from items where siteId = 1 would succeed, albeit a site record with id 1 exists This can easily be achieved on an application level. I recently started investigating further into row level policies, roles, functions, etc… which I found very interesting as they enable lower level setups. That is, I'm still new about it and lack understanding/knowledge. I was wondering if the use case described above could simply be solved within SQL (via a combination of policies, functions, etc… or any other Postgres builtin tools)?