ActionSlackUpdated May 2026

How do I set a Slack channel's purpose?

Short answer: Drop the "Slack → Set Channel Purpose" action anywhere in your workflow, map the inputs from upstream nodes, and publish.

Use this action All 45 Slack actions

Inputs

The fields this action accepts.

Every field can be mapped from an upstream trigger, AI step, table row, or hard-coded literal.

Field	Type	Required	Description
Channel channel	string	Required	Slack channel ID (starts with C for public, G for private group, D for DM). Find via List Channels. Not the channel name with #.
Purpose purpose	string	Required	The new purpose text. Up to 250 characters.

Sample request

{
  "channel": "e.g. C0123456789",
  "purpose": "{{trigger.purpose}}"
}

Returns

{
  "ok": true,
  "raw": {},
  "purpose": "All things growth team",
  "channel_id": "C123",
  "channel_name": "growth"
}

Use these fields in downstream nodes for routing, logging, or error handling.

Triggered by

Apps that pair well as the trigger for Set Channel Purpose.

Any of these apps can fire this action as part of a workflow.

Gmail → Slack

1 Gmail triggers

Google Sheets → Slack

2 Google Sheets triggers

FAQ

Questions about Set Channel Purpose.

What does the Set Channel Purpose action do in Slack?

Sets the longer "Purpose" description of a Slack channel. Shows in the channel details panel, distinct from the shorter Topic.

What inputs does Set Channel Purpose require?

Required: Channel, Purpose. Every input accepts a static value or a variable from any upstream node in your workflow.

Can I use dynamic inputs from earlier workflow nodes?

Yes. Any field on this action can pull values from upstream nodes, whether that's a form response, a trigger payload, an AI output, or a lookup result.

What happens if Slack returns an error?

The workflow pauses on the failed node, the error message is captured in the run log, and you can retry the run with one click. Auto-retry policies are configurable per workflow with exponential backoff up to 5 attempts.

Does Set Channel Purpose support batch operations?

Yes. Run Set Channel Purpose inside a Loop node to process arrays. Tiny Command handles Slack's rate limits automatically so you don't have to throttle manually.

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