discord_list_channels

THE RISK

Low Risk

Why discord_list_channels needs a policy

This tool retrieves and displays channel data from a Discord server without creating, modifying, or deleting any data. It is a straightforward information retrieval operation, making it a Read category tool. Severity is low because listing channels poses minimal risk even if misused by an AI agent—it only exposes channel names and structure that are typically visible to members already in the server.

From the tool's definition Tool name 'discord_list_channels' and description 'List channels in a Discord server' indicate retrieval of channel information with no side effects. No modification, deletion, or execution of commands is performed.

Documented attack patterns abuse exactly the kind of access discord_list_channels gives an agent:

POLICY

How to control discord_list_channels

PolicyLayer is an MCP gateway — it sits between your AI agents and Discord User, and nothing reaches the server without passing your rules. This is the rule we recommend for discord_list_channels:

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "discord_list_channels": {}
  }
}

discord_list_channels is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.

Create a free account and register Discord User — nothing to install.
Add this policy — paste it, or build it visually.
Point your MCP client (Claude, Cursor, anything) at your gateway URL.

CAP THIS TOOL →

Free to start. No card required.

EXPLORE

Related tools and policies

More Discord User tools

Destructive discord_delete_message Delete one of your own messages. This action is permanent and cannot be undone. Write discord_edit_message Edit one of your own messages. You can only edit messages you sent. Write discord_react Add a reaction emoji to a message. Use standard unicode emoji or custom emoji in name:id f Write discord_send_dm Send a direct message to a user. Provide user_id to open a new DM, or channel_id if you al Write discord_send_message Send a message to a Discord channel. Supports plain text and Discord markdown (bold, itali Read discord_find_message Find messages in a Discord server by author, content, or date range. Tries guild search fi Read discord_get_replies Get all replies to a specific message. Fetches messages after the target and filters for t Read discord_guild_info Get detailed information about a Discord server: name, description, member count, roles, a

All 16 Discord User tools →

Read tools on other servers

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Go deeper

The MCP Attack Database → Documented attack patterns against MCP deployments — and the policies that stop them.
Data exfiltration → How read access becomes an exfiltration channel when chained with untrusted content.
MCP token cost → What connecting this server costs in context-window tokens on every request.
Rate Limiting MCP Tool Calls: A Practical Guide →
MCP Security: Why Prompt Guardrails Aren't Enough →

FAQ

Questions about discord_list_channels

What does the discord_list_channels tool do? +

List channels in a Discord server, grouped by category. Use DISCORD_DEFAULT_GUILD env var to set a default server, or pass guild_id explicitly. It is categorised as a Read tool in the Discord User MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on discord_list_channels? +

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

What risk level is discord_list_channels? +

discord_list_channels is a Read tool with low risk. Read-only tools are generally safe to allow by default.

Can I rate-limit discord_list_channels? +

Yes. Add a rate_limit block to the discord_list_channels 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_list_channels completely? +

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

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

Enforce policy on every Discord User tool call.

Start from Discord User, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.

CHECK YOUR STACK →