Permanently delete a message that was sent through a webhook, using the webhook
AI agents call discord_delete_webhook_message to permanently remove resources in Discord — typically in cleanup and lifecycle workflows. It does its job in a single call, and there is no undo.
This tool removes messages irreversibly. Although scoped to webhook-sent messages, permanent deletion cannot be undone and represents a destructive action. In a multi-guild Discord server context with 60+ tools, misuse could erase communication history across channels. Severity is high rather than critical because impact is limited to individual messages within accessible webhooks, not system-wide or financial.
From the tool's definition Tool name contains 'delete' and description states 'Permanently delete a message' — irreversible data destruction.
Attacks that exploit this kind of access
Permanently delete a message that was sent through a webhook, using the webhook. It is categorised as a Destructive tool in the Discord MCP Server, which means it can permanently delete or destroy data. Block by default and require explicit approval.
Register the Discord MCP server in PolicyLayer and add a rule for discord_delete_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 Discord. Nothing to install.
discord_delete_webhook_message is a Destructive tool with critical risk. Critical-risk tools should be blocked by default and only enabled with explicit human approval.
Yes. Add a rate_limit block to the discord_delete_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.
Set action: deny in the PolicyLayer policy for discord_delete_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.
discord_delete_webhook_message 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.
Teams ship this data inside their own products. See what a licence covers →