generate_template builds a template and a landscape header image on the GreenTick server. It does not submit the template to Meta, and it does not send it. The assistant creates a new header image only with this tool. It does not use another image service, and it does not upload an image that was made somewhere else.
Ask this
What the assistant calls
1
Ask for the website
The assistant asks for the brand website before it generates, even when you did not mention a site. It does not invent a URL. It passes your URL as
brandSite. GreenTick fetches the logo file from that site and places that file on the header. It does not draw a lookalike.2
Generate
generate_template returns the template and the header. The assistant shows you that result. create_template stays unused until you ask to submit.upload_media is for a file you already have, not for this generated header. See Media and Templates. Submitting the result is Submit a template.