Mechanism
The Llama alt text generator reads a brief, not an image
This is the first thing to establish, because it separates this route from almost every page competing on the term. The request carries route, family, a text input bounded at 1 to 12,000 characters, and an optional instruction. There is no image field, no file upload, no drop target and no URL parameter. The engine has no vision and the page will not pretend otherwise.
What the model receives is an instruction to generate exactly the content the user's brief requests and to return only the finished content. So the pipeline is: you look at the image, you describe it, and a language model turns your description into an alt attribute.
Remote by family: the brief is transmitted, the allowance is 5 free runs per rolling 24 hours, and there is no account. The name refers to the workflow users arrive from. The route does not run Llama and has no affiliation with Meta.