Generate a document as a PDF and store it in the workspace. It never emails or sends anything, so a request to email or send a document is not a request to generate one. Pass exactly one source:
- `params`: values you provide, with a `document_slug`. Call well_list_generative_documents first: it gives each design's document_slug and the JSON Schema its params must satisfy. Values that do not match are refused with the path and reason of each problem, so fix them and call again. The design prints light unless `params.theme` is "dark". Each call prints and stores a new document, unless you pass `document_id`.
- `document_id` (with `params` only): when the user asks to change, fix or redo a document you already generated in this conversation, pass its document_id so it is replaced in place instead of adding a new file. Its document_id and links keep working and serve the new PDF. Only a document this tool generated from values can be replaced.
- `invoice_id`: an invoice already in Well. The PDF prints that invoice, in its own chosen ink, and is attached to it as its document. Pass a `document_slug` to choose the design; without one, the invoice's own chosen design prints. Refused when the invoice already carries a file a user or connector supplied: a generated PDF never replaces one. Generating again updates that same document in place, so its document_id and links keep working.
- `design` (with `invoice_id` only): the options the invoice-design card returned, passed exactly as the card gave them. `layout`, `theme` and `locale` choose the design, the ink and the language of this print, on an issued invoice too. `payment_terms_note_id`, `tax_rate_id`, `legal_mentions_note_id` and `payment_means_id` must equal what is saved on the invoice, or be null when nothing is saved: an id that differs is refused, so save a change with well_update_invoice_design first. Each option is optional, and every option left out keeps the value the invoice already holds. `theme` is a key of `design`, not a top-level input. Do not pass `design.layout` together with a different `document_slug`, or `design.locale` together with a different `locale`: the call is refused.
- `account_id`: a bank account of the workspace's own company. The PDF prints its bank account details sheet (RIB) from the stored IBAN and BIC.
Totals are never supplied: every sum is computed from the lines, so a printed total cannot disagree with the lines above it. The tool returns the stored PDF's document_id. A `guide` printed for a lead magnet guide on WhatsApp can return `success: false` with `say`: the person's free guide is used, nothing printed, and `say` is the exact ask, with their own invite link, to write as given.
`file` carries the PDF's name and size plus the links to fetch it. The result renders as a card with Download and View in Well; when no card is shown, hand the user `download_url`.
- `download_url` saves the PDF and `signed_url` opens it in a browser. Both work with a plain HTTP GET and no auth header, and stop working at `expires_at`.
- `preview_url` is a PNG image of the first page, for showing the document; add `page=N` for page N, up to `page_count`. Same token and expiry as the other links.
- `sheet_url` is the document's HTML sheet, which the card draws with zoom and pan. Same token and expiry.
- When the user wants to do more with a PDF already generated (attach it to an email, upload it elsewhere, read or analyse it, pass it to another tool), fetch `download_url` with a plain HTTP GET to get the bytes.
- If the links have expired, call this tool again: with `params` it prints a new document with fresh links; with `invoice_id` it refreshes the same document and its links.
- `app_url` opens the document in Well and never expires.
- The links grant access to the file on their own: share them only with the user, never in a public place.
With `invoice_id` of an issued invoice, the PDF is the issued invoice and `portal_url` is its customer page, the page its QR code opens, for the owner to forward to the customer. It is null when the invoice has no customer page.
