discord_reply_to_forum

Post responses to Discord forum threads by providing a thread ID and message content for AI assistants to participate in discussions.

Instructions

Adds a reply to an existing forum post or thread

Input Schema

TableJSON Schema

Name	Required	Description	Default
`threadId`	Yes
`message`	Yes

Implementation Reference

src/tools/forum.ts:176-223 (handler)

The primary handler function that executes the discord_reply_to_forum tool: validates input, fetches the forum thread, checks permissions, sends the reply message, and returns success or error.

export const replyToForumHandler: ToolHandler = async (args, { client }) => {
  const { threadId, message } = ReplyToForumSchema.parse(args);

  try {
    if (!client.isReady()) {
      return {
        content: [{ type: 'text', text: 'Discord client not logged in.' }],
        isError: true,
      };
    }

    const thread = await client.channels.fetch(threadId);
    if (!thread?.isThread()) {
      return {
        content: [
          { type: 'text', text: `Cannot find thread with ID: ${threadId}` },
        ],
        isError: true,
      };
    }

    if (!('send' in thread)) {
      return {
        content: [
          {
            type: 'text',
            text: 'This thread does not support sending messages',
          },
        ],
        isError: true,
      };
    }

    // Send the reply
    const sentMessage = await thread.send(message);

    return {
      content: [
        {
          type: 'text',
          text: `Successfully replied to forum post. Message ID: ${sentMessage.id}`,
        },
      ],
    };
  } catch (error) {
    return handleDiscordError(error);
  }
};

src/tool-list.ts:106-117 (schema)

MCP tool definition including name, description, and input schema (threadId and message required).

{
  name: 'discord_reply_to_forum',
  description: 'Adds a reply to an existing forum post or thread',
  inputSchema: {
    type: 'object',
    properties: {
      threadId: { type: 'string' },
      message: { type: 'string' },
    },
    required: ['threadId', 'message'],
  },
},

src/server.ts:128-131 (registration)

Registration and dispatch in the MCP server's tool call handler switch statement, invoking the replyToForumHandler.

case 'discord_reply_to_forum':
  this.logClientState('before discord_reply_to_forum handler');
  toolResponse = await replyToForumHandler(args, this.toolContext);
  return toolResponse;

MCP-Discord