Delete a webhook subscription on PostEverywhere. Cascades to delete the delivery history.
AI agents call delete_webhook to permanently remove resources in Posteverywhere — typically in cleanup and lifecycle workflows. It does its job in a single call, and there is no undo.
This tool permanently removes webhook configurations and associated delivery history. While not directly financial or a mass data wipe, webhook deletions have cascading side effects (delivery history removal) that cannot be recovered. This is destructive in nature and warrants high severity due to potential loss of event tracking/audit data and disruption of automation workflows that depend on the webhook.
From the tool's definition delete_webhook irreversibly deletes a webhook subscription and cascades to delete delivery history, which cannot be undone.
Attacks that exploit this kind of access
Delete a webhook subscription on PostEverywhere. Cascades to delete the delivery history. It is categorised as a Destructive tool in the Posteverywhere MCP Server, which means it can permanently delete or destroy data. Block by default and require explicit approval.
Register the Posteverywhere MCP server in PolicyLayer and add a rule for delete_webhook: 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 Posteverywhere. Nothing to install.
delete_webhook 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 delete_webhook 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 delete_webhook. 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.
delete_webhook is provided by the Posteverywhere MCP server (posteverywhere/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 →