Descript edit via project agent

Imported from kkundlas/smg-social-assets (skills/descript-edit-via-project-agent/SKILL.md). Install upstream with npx skills add kkundlas/smg-social-assets --skill descript-edit-via-project-agent. Copyright stays with the author.

Descript edit via project agent

Underlord is the only MCP edit primitive (prompt_project_agent). One-shot — not a chat. Look up the live schema before calling.

Steps

1. Resolve the target. list_projects / get_project. Pass composition_id (UUID, 5-char short ID, or https://web.descript.com/{project_id}/{short_id}) when it is not the first composition.
2. Write a one-shot prompt: action + context + constraints (aspect, duration, style, what not to change). Official examples: “Add studio sound and captions”; “remove all filler words”; “create a 30-second highlight reel”; “Write a script about X and create a video.”
3. Existing project: project_id. Brand-new from a prompt: project_name only.
4. Optional model only if the user named one. Otherwise omit (auto).
5. Call prompt_project_agent. Show project_url immediately.
6. wait_for_job (default up to 300s; re-wait if still running). Surface progress.label (e.g. “Editing script”).
7. Report result.agent_response, whether the project changed, and credits / media seconds used. get_project if new compositions appeared.
8. If they dislike it, point them at UI revert (File → version history, or Underlord undo). Do not publish unless they explicitly say yes.

Drive admin can disable the agent (403). 402 = out of minutes/credits. Cannot edit while a recording is in progress. Review the project in Descript — Underlord can overpromise.