List the webhooks in a single channel or across a whole server (id, name, channel, token when visible, creator). Provide exactly one of channel_id or guild_id. Requires the Manage Webhooks permission. Read-only.
AI agents call discord_list_webhooks to retrieve information from Discord without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This is a retrieval/query operation with no side effects. However, the sensitivity is elevated from 'low' to 'medium' because it exposes webhook tokens, which are secrets that could be used to post messages to channels if leaked or misused by an AI agent. An attacker with token visibility could impersonate the webhook.
From the tool's definition Tool description explicitly states 'List the webhooks' and 'Read-only.' It retrieves webhook information including id, name, channel, token, and creator without modifying any data.
Attacks that exploit this kind of access
List the webhooks in a single channel or across a whole server (id, name, channel, token when visible, creator). Provide exactly one of channel_id or guild_id. Requires the Manage Webhooks permission. Read-only. It is categorised as a Read tool in the Discord MCP Server, which means it retrieves data without modifying state.
Register the Discord MCP server in PolicyLayer and add a rule for discord_list_webhooks: 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.
discord_list_webhooks is a Read tool with low risk. Read-only tools are generally safe to allow by default.
Yes. Add a rate_limit block to the discord_list_webhooks 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.
Set action: deny in the PolicyLayer policy for discord_list_webhooks. 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.
discord_list_webhooks is provided by the Discord MCP server (@pasympa/discord-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Every MCP server has a record like this.
Type a name, get the same breakdown: verified identity, auth posture, risk grade, capabilities, recommended policy.
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