discord_send_message

Q: What does the discord_send_message tool do?

Discordチャンネルにメッセージを送信します。 content、embedsのいずれか最低1つが必要です。 環境変数DISCORD_WEBHOOK_URLに設定されたWebhookを使用します。 ⚠️ レート制限: 30メッセージ/分/チャンネル Args: - content (string, optional): メッセージ内容（1-2000文字） - username (string, optional): Webhookのユーザー名を上書き（最大80文字） - avatar_url (string, optional): Webhookのアバター画像をURLで指定 - tts (boolean, optional): テキスト読み上げ（TTS）メッセージとして送信（デフォルト: false） - embeds (array, optional): Embedの配列（最大10個、合計6000文字以内） - allowed_mentions (object, optional): 許可されたメンション設定 - thread_id (string, optional): 送信先スレッドID（指定したスレッドに送信、スレッドは自動アーカイブ解除） - thread_name (string, optional): 作成するスレッド名（フォーラム/メディアチャンネルのみで新しいスレッドを作成、最大100文字） Returns: {. It is categorised as a Write tool in the Discord Webhook MCP MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

Server Discord Webhook MCP kongyo2/discord-mcp

Category Write

Risk class Medium

Parameters 00 required

WHAT IT DOES

What discord_send_message does on Discord Webhook MCP

AI agents use discord_send_message to create or update resources in Discord Webhook MCP — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Discord Webhook MCP environment.

WHY IT NEEDS A POLICY

Why discord_send_message needs a policy

This tool creates new Discord messages, which is a reversible write operation. While it doesn't modify or delete data, it does create persistent content in external systems (Discord channels).

From the tool's definition Tool description states it "sends messages" (discord_send_message) to Discord channels with support for content, embeds, usernames, avatars, TTS, mentions, and thread interactions.

Attacks that exploit this kind of access

Questions about discord_send_message

What does the discord_send_message tool do? +

Discordチャンネルにメッセージを送信します。 content、embedsのいずれか最低1つが必要です。環境変数DISCORD_WEBHOOK_URLに設定されたWebhookを使用します。 ⚠️ レート制限: 30メッセージ/分/チャンネル Args: - content (string, optional): メッセージ内容（1-2000文字） - username (string, optional): Webhookのユーザー名を上書き（最大80文字） - avatar_url (string, optional): Webhookのアバター画像をURLで指定 - tts (boolean, optional): テキスト読み上げ（TTS）メッセージとして送信（デフォルト: false） - embeds (array, optional): Embedの配列（最大10個、合計6000文字以内） - allowed_mentions (object, optional): 許可されたメンション設定 - thread_id (string, optional): 送信先スレッドID（指定したスレッドに送信、スレッドは自動アーカイブ解除） - thread_name (string, optional): 作成するスレッド名（フォーラム/メディアチャンネルのみで新しいスレッドを作成、最大100文字） Returns: {. It is categorised as a Write tool in the Discord Webhook MCP MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on discord_send_message? +

Register the Discord Webhook MCP server in PolicyLayer and add a rule for discord_send_message: allow, deny, rate-limit, or require approval. Point your MCP client at the PolicyLayer proxy URL and the rule is enforced on every call, before it reaches Discord Webhook MCP. Nothing to install.

What risk level is discord_send_message? +

discord_send_message is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.

Can I rate-limit discord_send_message? +

Yes. Add a rate_limit block to the discord_send_message rule in your PolicyLayer policy. For example, setting max: 10 and window: 60 limits the tool to 10 calls per minute. Rate limits are tracked per agent session and reset automatically.

How do I block discord_send_message completely? +

Set action: deny in the PolicyLayer policy for discord_send_message. The AI agent will receive a policy violation error and cannot call the tool. You can also include a reason field to explain why the tool is blocked.

What MCP server provides discord_send_message? +

discord_send_message is provided by the Discord Webhook MCP server (kongyo2/discord-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.