discord_create_webhook · MCP-Discord MCP: Risk & Policy

WHAT IT DOES

What discord_create_webhook does on MCP-Discord

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

WHY IT NEEDS A POLICY

Why discord_create_webhook needs a policy

Creating a webhook is a reversible write operation that establishes new integration points for external systems to post messages to Discord. It modifies server configuration but does not delete data or execute arbitrary external code.

From the tool's definition Tool name is 'discord_create_webhook' and description states it 'Creates a new webhook for a Discord channel'. The word 'Creates' indicates a write operation that adds new data/configuration to Discord.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

discord_create_webhook Rate-limited

discord_create_webhook 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_create_webhook": {
      "limits": [
        {
          "counter": "discord_create_webhook_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

LIMIT THIS TOOL →

Instant setup, no code required.

PolicyLayer is an MCP gateway: every tool call is checked against your rule before it reaches MCP-Discord, so you can run agents against it safely.

FAQ

Questions about discord_create_webhook

What does the discord_create_webhook tool do? +

Creates a new webhook for a Discord channel. It is categorised as a Write tool in the MCP-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_create_webhook? +

Register the MCP-Discord MCP server in PolicyLayer and add a rule for discord_create_webhook: 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 MCP-Discord. Nothing to install.

What risk level is discord_create_webhook? +

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

Can I rate-limit discord_create_webhook? +

Yes. Add a rate_limit block to the discord_create_webhook 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_create_webhook completely? +

Set action: deny in the PolicyLayer policy for discord_create_webhook. 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_create_webhook? +

discord_create_webhook is provided by the MCP-Discord MCP server (jar285/mcp-discord). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.