Update Slack send message docs with new link and media preview settings (TSP-1333)

[claude]

Summary

• Added an Advanced settings section to the Slack Send Message Tool step documentation
• Documents the two new optional settings introduced in PR #15926:
  • Link previews — Show/Hide dropdown controlling unfurl_links (whether Slack auto-expands URLs into preview cards)
  • Media previews — Show/Hide dropdown controlling unfurl_media (whether Slack auto-expands media into inline preview cards)
• Notes backward compatibility: leaving settings unselected preserves existing behavior
• Notes which tool variants include these settings (slack_message, slack_message_advanced, slack_message_v2)

References

• Linear: https://linear.app/relevance/issue/TSP-1333/
• Implementation PR: RelevanceAI/relevance-ai#15926

[linear]

TSP-1333

[github-actions]

🎯 Vibe check

Reviewed: 1 file (1 with issues, 0 clean)

Scores

	Dimension	Score	What's holding it back
🟡	Consistency	8/10	"here" as link text violates CLAUDE.md's explicit rule; iframe title reads "Add the Python Tool step to your Tool" on a Slack page.
🟡	Technical clarity	8/10	Supademo embed ID is identical to the one used on the general Slack integration setup page — likely the wrong demo video for the "how to add the Send Message step" section.
🟢	Non-technical clarity	9/10	The new Advanced settings section is clear and well-written. API parameter names (unfurl_links, unfurl_media) give technical readers what they need.
🟢	Structure	10/10	No issues found.

Score key: 🟢 9–10, 🟡 6–8, 🔴 1–5.

✨ Overall vibe: The new Advanced settings content is the real addition here and it's solid — concise descriptions, correct API parameter references, and genuinely useful guidance on when to use each toggle. Two carry-over copy-paste errors from surrounding pages drag the score down slightly but don't affect the new content itself.

🔧 Issues (3)

• build/tools/tool-steps/slack/send-message.mdx:9 — [here] as link text violates CLAUDE.md: "Descriptive link text — never 'click here' or 'read more'." Change to [the Slack integration](/integrations/popular-integrations/slack).

• build/tools/tool-steps/slack/send-message.mdx:16 — iframe title reads "Add the Python Tool step to your Tool" — copy-paste error from a Python tool step page. Update to "Add the 'Slack - Send Message' Tool step to your Tool" (the same error exists on the sibling retrieve-messages.mdx:16, so it wasn't introduced here, but it's propagated into this new file).

• build/tools/tool-steps/slack/send-message.mdx:16 — Supademo embed ID cmb77dn944hpdppkpmiavfbmi is identical to the embed on integrations/popular-integrations/slack.mdx:22, which is the general Slack integration setup demo. This page's section heading is "Add the 'Slack - Send Message' Tool step to your Tool", implying a demo specific to adding that step — verify this is the intended video or replace with the correct embed ID.

✅ Clean files (0)

No files were fully clean — the issues above apply to the single changed file.

🔋 Credit usage

Item	Count
Files reviewed	1
Context pages read	2
Total lines processed	~390

Files read: build/tools/tool-steps/slack/send-message.mdx (44 lines), build/tools/tool-steps/slack/retrieve-messages.mdx (26 lines), integrations/popular-integrations/slack.mdx (320 lines)

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