Add a screenshot or GIF to the article. Returns a screenshot_id to place in the article via update_article using `<SCREENSHOT screenshot_id>`.
- kind="image": pass `timestamp` to capture a frame from the project's base video, OR pass `mcp_upload_id` (from the upload tool) to attach an uploaded image. One of the two is required.
- kind="gif": pass `timestamp` (start) and `duration` (seconds). Captures a short GIF clip from the base video. Requires the project to have a video clip.
Connector