Gandi is a domain registrar. Once you connect it, your assistants can check whether a name is free, list the domains you own, register a new one, and point a domain at your site through Gandi's DNS. Registering a domain and every DNS change stop at your Approve.
Checking names and listing your domains happen on their own.
Registering a domain always waits for your Approve. The request shows what Gandi charges now and for each renewal year, and names the registrant contact that will be used. A name check only says whether a name is free.
Setting DNS records or nameservers always waits for your Approve, and the request lists exactly what will change.
No Auto-approve choice in Settings skips these. See approvals.
Gandi tokens expire. Once yours runs out, the assistants cannot reach Gandi until you create a new token and paste it in Integrations. A reminder in your calendar a few days before helps.
Just before it registers, the assistant asks Gandi again. If the name was taken, or Gandi now charges more than you approved, nothing is registered and the assistant tells you why.
To use other registrant details for one domain, reply with them before you approve. The assistant posts a new request with those details.