send_webhook_message

SERVERGuildControl MCP SOURCEguildctl

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/app-lasers-guildcontrol-discord/send-webhook-message.md

WHAT IT DOES

What send_webhook_message does on GuildControl MCP

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

RISK

Why send_webhook_message is rated Medium

Tool creates messages in Discord reversibly; bounded, audited, with anti-spam controls and no persistence mitigates severity.

From the tool's definition Send message through webhook; one-shot operation; mutations; notification parsing

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs send_webhook_message safely

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

send_webhook_message Rate-limited

send_webhook_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": {
    "send_webhook_message": {
      "limits": [
        {
          "counter": "send_webhook_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 GuildControl MCP, apply this rule, and every send_webhook_message call is checked against it from then on.

FAQ

Questions about send_webhook_message

What does the send_webhook_message tool do? +

Send one bounded plain-text message through one privately managed Discord Incoming webhook with exact allowlisted user notifications, empty role and everyone mention parsing, suppressed embeds, per-channel anti-spam limits, a durable one-shot operation key, one non-retried mutation, and exact response plus readback verification. The credential and execution URL never enter MCP data or durable records; message content is not persisted. It is categorised as a Write tool in the GuildControl 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 send_webhook_message? +

Register the GuildControl MCP server in PolicyLayer and add a rule for send_webhook_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 GuildControl MCP. Nothing to install.

What risk level is send_webhook_message? +

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

Can I rate-limit send_webhook_message? +

Yes. Add a rate_limit block to the send_webhook_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 send_webhook_message completely? +

Set action: deny in the PolicyLayer policy for send_webhook_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 send_webhook_message? +

send_webhook_message is provided by the GuildControl MCP server (guildctl). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

KEEP EXPLORING

More on GuildControl, and thousands of servers like it.

This server

All 258 GuildControl tools →

Across the catalogue

sms_send on Twilio SMS MCP Server →send-draft on Meme MCP Server → The MCP Attack Database →

Guides

Govern customer-ops agents →Argument validation →Scoped token →