Arguments passed to the connector tool. String values support {placeholders}. In 'summary'/'chunked' mode: {itemCount}, {itemsText} (formatted list of videos/channels/comments), {message} (the rendered template below); 'chunked' also gives {part}/{partCount} (1-based part number and total — put these in a page title, e.g. 'YouTube results (part {part}/{partCount})'). In 'perItem' mode: {type} ('video'/'channel'/'comment') plus whichever of these fields the record has — video: {videoId}, {title}, {description}, {channelId}, {channelName}, {channelUrl}, {viewCount}, {likeCount}, {commentCount}, {duration}, {durationStr}, {thumbnail}, {isLive}, {isShort}, {tags}, {categories}, {language}, {uploadDate}, {url}; channel: {channelId}, {channelName}, {channelUrl}, {description}, {subscriberCount}, {videoCount}, {thumbnail}, {country}; comment: {videoId}, {commentId}, {text}, {author}, {authorId}, {likes}, {replyCount}, {isReply}, {publishedAt}; always available: {scrapedAt}, {message}. Example for Slack: {"channel": "#youtube", "text": "{message}"}.