Delete one authenticated-user passkey by id.
AI agents call delete_passkey to permanently remove resources in Run402 — typically in cleanup and lifecycle workflows. It does its job in a single call, and there is no undo.
This tool permanently removes a passkey credential, which cannot be undone. Deletion of authentication factors is destructive and can lock users out of accounts. The blast radius is high because removing a passkey affects user account security and access.
From the tool's definition Tool name 'delete_passkey' and description 'Delete one authenticated-user passkey by id' explicitly state irreversible deletion of authentication credentials.
Attacks that exploit this kind of access
Delete one authenticated-user passkey by id. It is categorised as a Destructive tool in the Run402 MCP Server, which means it can permanently delete or destroy data. Block by default and require explicit approval.
Register the Run402 MCP server in PolicyLayer and add a rule for delete_passkey: 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 Run402. Nothing to install.
delete_passkey 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_passkey 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_passkey. 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_passkey is provided by the Run402 MCP server (kychee-com/run402). 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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