send_embed · Discord Webhook MCP: Risk & Policy

WHAT IT DOES

What send_embed does on Discord Webhook MCP

AI agents use send_embed 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 send_embed needs a policy

This tool creates new messages (embeds) on Discord, which is a reversible write operation. While sending unsolicited messages could constitute spam or harassment, the operation itself does not execute code, delete data, or commit financial transactions.

From the tool's definition Tool name 'send_embed' and description 'Send a rich embed message to Discord' indicate the tool creates and posts new content to Discord.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

send_embed Rate-limited

send_embed 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_embed": {
      "limits": [
        {
          "counter": "send_embed_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 Discord Webhook MCP, so you can run agents against it safely.

FAQ

Questions about send_embed

What does the send_embed tool do? +

Send a rich embed message to Discord. Embeds can include titles, descriptions, colors, images, thumbnails, author info, footer, and timestamps. Perfect for formatted, visually appealing messages. 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 send_embed? +

Register the Discord Webhook MCP server in PolicyLayer and add a rule for send_embed: 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 send_embed? +

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

Can I rate-limit send_embed? +

Yes. Add a rate_limit block to the send_embed 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_embed completely? +

Set action: deny in the PolicyLayer policy for send_embed. 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_embed? +

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