Use when the agent needs to send, edit, delete, or read Slack messages, add or list emoji reactions, pin or unpin messages, fetch member info, or list custom emoji in Slack channels and DMs. Handles all Slack workspace interactions including message management, reaction workflows, pinned-item management, and user lookups via the configured bot token.
Use slack to react, manage pins, send/edit/delete messages, and fetch member info. The tool uses the bot token configured for Otto.
channelId and messageId (Slack message timestamp, e.g. 1712023032.1234).emoji (Unicode or :name:).to target (channel:<id> or user:<id>) and content.Message context lines include slack message id and channel fields you can reuse directly.
| Action group |
|---|
| Default |
|---|
| Notes |
|---|
| reactions | enabled | React + list reactions |
| messages | enabled | Read/send/edit/delete |
| pins | enabled | Pin/unpin/list |
| memberInfo | enabled | Member info |
| emojiList | enabled | Custom emoji list |
{
"action": "react",
"channelId": "C123",
"messageId": "1712023032.1234",
"emoji": "✅"
}
{
"action": "reactions",
"channelId": "C123",
"messageId": "1712023032.1234"
}
{
"action": "sendMessage",
"to": "channel:C123",
"content": "Hello from Otto"
}
{
"action": "editMessage",
"channelId": "C123",
"messageId": "1712023032.1234",
"content": "Updated text"
}
{
"action": "deleteMessage",
"channelId": "C123",
"messageId": "1712023032.1234"
}
{
"action": "readMessages",
"channelId": "C123",
"limit": 20
}
{
"action": "pinMessage",
"channelId": "C123",
"messageId": "1712023032.1234"
}
{
"action": "unpinMessage",
"channelId": "C123",
"messageId": "1712023032.1234"
}
{
"action": "listPins",
"channelId": "C123"
}
{
"action": "memberInfo",
"userId": "U123"
}
{
"action": "emojiList"
}