Permanently delete a Vapi assistant. This cannot be undone.
AI agents call vapi_delete_assistant to permanently remove resources in Mcp Vapi — typically in cleanup and lifecycle workflows. It does its job in a single call, and there is no undo.
This tool irreversibly deletes an assistant configuration, which cannot be recovered. While not financial or involving system-level code execution, the permanent loss of a voice assistant configuration (which may contain business logic, settings, and potentially linked resources) represents high severity. An AI agent misusing this could cause significant operational disruption by deleting production assistants.
From the tool's definition Tool description explicitly states: "Permanently delete a Vapi assistant. This cannot be undone." The word "Permanently" and "cannot be undone" are definitive indicators of irreversible data deletion.
Attacks that exploit this kind of access
Permanently delete a Vapi assistant. This cannot be undone. It is categorised as a Destructive tool in the Mcp Vapi MCP Server, which means it can permanently delete or destroy data. Block by default and require explicit approval.
Register the Mcp Vapi MCP server in PolicyLayer and add a rule for vapi_delete_assistant: 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 Mcp Vapi. Nothing to install.
vapi_delete_assistant 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 vapi_delete_assistant 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 vapi_delete_assistant. 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.
vapi_delete_assistant is provided by the Mcp Vapi MCP server (adhirajhangal/mcp-vapi). 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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