Delete a persisted webhook hook by ID.
AI agents call webhook_delete to permanently remove resources in Mementos — typically in cleanup and lifecycle workflows. It does its job in a single call, and there is no undo.
This tool permanently removes a webhook configuration, which cannot be undone. Even though webhooks are configuration rather than data, their deletion is irreversible and could disrupt integrations or automation workflows that depend on them. The high severity reflects the potential for an AI agent to inadvertently delete critical webhook infrastructure.
From the tool's definition Tool name 'webhook_delete' and description 'Delete a persisted webhook hook by ID' explicitly indicate irreversible deletion of a webhook resource.
Attacks that exploit this kind of access
Delete a persisted webhook hook by ID. It is categorised as a Destructive tool in the Mementos MCP Server, which means it can permanently delete or destroy data. Block by default and require explicit approval.
Register the Mementos MCP server in PolicyLayer and add a rule for webhook_delete: 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 Mementos. Nothing to install.
webhook_delete 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 webhook_delete 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 webhook_delete. 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.
webhook_delete is provided by the Mementos MCP server (@hasna/mementos). 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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