discord_send_message

Send a message to a channel

SERVERDiscord SOURCEarrrnmp/discord-mcp

Medium RISK CLASS

Category Write

Parameters 00 required

Recommended Rate-limitedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/arrrnmp-discord-mcp/discord-send-message.md

WHAT IT DOES

What discord_send_message does on Discord

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

RISK

Why discord_send_message is rated Medium

Sending a message is a write operation that creates content reversibly. While messages can be deleted, the primary action is creation/posting of data. Severity is medium because message spam or misinformation could disrupt a Discord community, but individual messages are not destructive or irreversible in themselves. Confidence is high given the clear, unambiguous name and description.

From the tool's definition Tool name is 'discord_send_message' and description states 'Send a message to a channel' — this creates new data (a message) in a Discord channel.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs discord_send_message safely

PolicyLayer is an MCP gateway: it sits between your AI agents and Discord, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For discord_send_message, this is the rule to start with:

discord_send_message Rate-limited

discord_send_message stays usable, but capped: an agent stuck in a loop can't make hundreds of changes a minute. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "discord_send_message": {
      "limits": [
        {
          "counter": "discord_send_message_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

LIMIT THIS TOOL → Instant setup, no code required.

The button opens the PolicyLayer dashboard: create your workspace, connect Discord, apply this rule, and every discord_send_message call is checked against it from then on.

FAQ

Questions about discord_send_message

What does the discord_send_message tool do? +

Send a message to a channel. It is categorised as a Write tool in the Discord 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 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. 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 MCP server (arrrnmp/discord-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

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