Slack

Use the slack tool. Reuse channelId and Slack timestamp message IDs from context when present.

Inputs

• channelId: Slack channel ID.
• messageId: Slack timestamp, e.g. 1712023032.1234.
• to: channel:<id> or user:<id> for sends.
• emoji: Unicode or :name: for reactions.

Actions

{ "action": "sendMessage", "to": "channel:C123", "content": "Hello" }

{ "action": "readMessages", "channelId": "C123", "limit": 20 }

{
  "action": "react",
  "channelId": "C123",
  "messageId": "1712023032.1234",
  "emoji": ":white_check_mark:"
}

{ "action": "reactions", "channelId": "C123", "messageId": "1712023032.1234" }

{
  "action": "editMessage",
  "channelId": "C123",
  "messageId": "1712023032.1234",
  "content": "Updated text"
}

{ "action": "deleteMessage", "channelId": "C123", "messageId": "1712023032.1234" }

{ "action": "pinMessage", "channelId": "C123", "messageId": "1712023032.1234" }

{ "action": "unpinMessage", "channelId": "C123", "messageId": "1712023032.1234" }

{ "action": "listPins", "channelId": "C123" }

{ "action": "memberInfo", "userId": "U123" }

{ "action": "emojiList" }

Safety

• Confirm destructive deletes when context is unclear.
• Keep outbound messages short; avoid Markdown tables.
• Prefer thread/message IDs over fuzzy channel names.