modify_server · Discord MCP: Risk & Policy

WHAT IT DOES

What modify_server does on Discord

AI agents use modify_server 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.

WHY IT NEEDS A POLICY

Why modify_server needs a policy

The tool modifies server settings reversibly—changes to server configuration can be undone by modifying them again. While the sibling tools include destructive operations (ban_member, bulk_delete_messages) and execute-class actions (assign_role, create_channel), modify_server itself applies non-destructive, reversible updates to server metadata and settings.

From the tool's definition Tool name 'modify_server' and description 'Modify server settings (requires appropriate permissions)' indicate this tool creates or modifies server configuration data such as name, description, icon, roles hierarchy, permissions, or channels structure.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

modify_server Rate-limited

modify_server 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": {
    "modify_server": {
      "limits": [
        {
          "counter": "modify_server_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, so you can run agents against it safely.

FAQ

Questions about modify_server

What does the modify_server tool do? +

Modify server settings (requires appropriate permissions). 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 modify_server? +

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

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

Can I rate-limit modify_server? +

Yes. Add a rate_limit block to the modify_server 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 modify_server completely? +

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

modify_server is provided by the Discord MCP server (scarecr0w12/discord-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.