Slack MCP Server

Instructions

Implementation Reference

• src/tools/messages.ts:49-64 (handler)

  The main handler function that executes the delete_message tool logic: validates input with schema, calls Slack's chat.delete API, and returns confirmation.

  export async function deleteMessage(client: SlackClientWrapper, args: unknown) {
    const params = deleteMessageSchema.parse(args);
  
    return await client.safeCall(async () => {
      await client.getClient().chat.delete({
        channel: params.channel,
        ts: params.ts,
      });
  
      return {
        ok: true,
        channel: params.channel,
        ts: params.ts,
      };
    });
  }

• src/utils/validators.ts:59-62 (schema)

  Zod input validation schema defining required channel ID and message timestamp for the delete_message tool.

  export const deleteMessageSchema = z.object({
    channel: channelIdSchema,
    ts: timestampSchema,
  });

• src/index.ts:217-234 (registration)

  Tool metadata registration in the list_tools handler: defines name, description, and JSON input schema for delete_message.

  {
    name: 'delete_message',
    description: 'Delete a message',
    inputSchema: {
      type: 'object',
      properties: {
        channel: {
          type: 'string',
          description: 'Channel ID',
        },
        ts: {
          type: 'string',
          description: 'Message timestamp',
        },
      },
      required: ['channel', 'ts'],
    },
  },

• src/index.ts:428-428 (registration)

  Runtime handler binding in the call_tool dispatcher: maps delete_message calls to the messageTools.deleteMessage implementation.

  delete_message: (args) => messageTools.deleteMessage(slackClient, args),