Purge Kerberos tickets from a logon session. Removes all tickets from the current session, or with elevation, from a specific LUID.
AI agents call rubeus_purge to permanently remove resources in Rubeus MCP Server — typically in cleanup and lifecycle workflows. It does its job in a single call, and there is no undo.
This tool irreversibly deletes Kerberos tickets, which cannot be undone without re-authentication. While not data deletion in the traditional sense, purging authentication credentials is a destructive action with significant operational impact. The ability to remove all tickets from a session (or another LUID with elevation) meets the Destructive category criterion of actions that cannot be undone.
From the tool's definition Tool name 'rubeus_purge' combined with description 'Purge Kerberos tickets from a logon session. Removes all tickets from the current session' — the word 'purge' and 'removes all' indicate irreversible deletion of authentication credentials.
Attacks that exploit this kind of access
Purge Kerberos tickets from a logon session. Removes all tickets from the current session, or with elevation, from a specific LUID. It is categorised as a Destructive tool in the Rubeus MCP Server MCP Server, which means it can permanently delete or destroy data. Block by default and require explicit approval.
Register the Rubeus MCP Server MCP server in PolicyLayer and add a rule for rubeus_purge: 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 Rubeus MCP Server. Nothing to install.
rubeus_purge 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 rubeus_purge 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 rubeus_purge. 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.
rubeus_purge is provided by the Rubeus MCP Server MCP server (schwarztim/sec-rubeus-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.
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