slack_reply_to_thread
Post replies to specific message threads in Slack channels using channel ID, thread timestamp, and reply text.
Instructions
Reply to a specific message thread in Slack
Input Schema
TableJSON Schema
| Name | Required | Description | Default |
|---|---|---|---|
| channel_id | Yes | The ID of the channel containing the thread | |
| thread_ts | Yes | The timestamp of the parent message in the format '1234567890.123456'. Timestamps in the format without the period can be converted by adding the period such that 6 numbers come after it. | |
| text | Yes | The reply text |
Implementation Reference
- index.ts:423-439 (handler)Switch case handler for 'slack_reply_to_thread' tool: validates arguments and invokes slackClient.postReply to execute the reply.
case "slack_reply_to_thread": { const args = request.params .arguments as unknown as ReplyToThreadArgs; if (!args.channel_id || !args.thread_ts || !args.text) { throw new Error( "Missing required arguments: channel_id, thread_ts, and text", ); } const response = await slackClient.postReply( args.channel_id, args.thread_ts, args.text, ); return { content: [{ type: "text", text: JSON.stringify(response) }], }; } - index.ts:259-276 (helper)Core implementation in SlackClient that posts a reply to a thread using Slack's chat.postMessage API with thread_ts parameter.
async postReply( channel_id: string, thread_ts: string, text: string, ): Promise<any> { const response = await fetch("https://slack.com/api/chat.postMessage", { method: "POST", headers: this.headers, body: JSON.stringify({ channel: channel_id, thread_ts: thread_ts, text: text, as_user: this.isUserToken }), }); return response.json(); } - index.ts:93-114 (schema)Tool definition with name, description, and input schema specifying required parameters: channel_id, thread_ts, text.
const replyToThreadTool: Tool = { name: "slack_reply_to_thread", description: "Reply to a specific message thread in Slack", inputSchema: { type: "object", properties: { channel_id: { type: "string", description: "The ID of the channel containing the thread", }, thread_ts: { type: "string", description: "The timestamp of the parent message in the format '1234567890.123456'. Timestamps in the format without the period can be converted by adding the period such that 6 numbers come after it.", }, text: { type: "string", description: "The reply text", }, }, required: ["channel_id", "thread_ts", "text"], }, }; - index.ts:535-544 (registration)Registration of the tool in the list returned by ListToolsRequest handler.
tools: [ listChannelsTool, postMessageTool, replyToThreadTool, addReactionTool, getChannelHistoryTool, getThreadRepliesTool, getUsersTool, getUserProfileTool, ], - index.ts:22-26 (schema)TypeScript interface defining the expected arguments for the slack_reply_to_thread tool.
interface ReplyToThreadArgs { channel_id: string; thread_ts: string; text: string; }