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schwarztim

Mimikatz MCP Server

by schwarztim

mimikatz_kerberos_ptt

Import a Kerberos ticket file into the current Windows session to enable pass-the-ticket attacks, granting access without requiring a password.

Instructions

Pass-the-Ticket: Import a Kerberos ticket into the current session

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
ticketYesPath to ticket file (.kirbi)

Schema Changelog

Changes observed during successful MCP inspections.

  1. First observedv1.0.0

TDQS

B3.3/5.0
Behavior2/5

Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?

No annotations are provided, so the description carries the full burden of explaining behavior. It discloses that a ticket is imported into the current session, but it does not mention side effects, required privileges, expected output, or that this modifies the session's Kerberos ticket cache. This is a thin description for a security-sensitive operation.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Conciseness5/5

Is the description appropriately sized, front-loaded, and free of redundancy?

A single, front-loaded sentence captures the tool's core function with no filler. Every word contributes meaning, and the widely recognized 'Pass-the-Ticket' label reinforces the intent.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Completeness3/5

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

For a one-parameter tool, the description is mostly sufficient to know what to pass. However, it lacks practical context about when this step is needed in an attack workflow, what happens after import, and any prerequisites or caveats. An agent could invoke it correctly but with limited understanding of consequences.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Parameters3/5

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

Schema coverage is 100%, with the 'ticket' parameter described as a path to a .kirbi file. The description adds no parameter-level detail beyond the schema, so the baseline score of 3 is appropriate.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Purpose4/5

Does the description clearly state what the tool does and how it differs from similar tools?

The description states a specific action, 'Import a Kerberos ticket', and a clear scope, 'into the current session'. It is distinct from sibling tools that create, list, or purge Kerberos tickets, though it does not explicitly name those alternatives.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Usage Guidelines3/5

Does the description explain when to use this tool, when not to, or what alternatives exist?

The phrase 'Pass-the-Ticket' and 'into the current session' imply the intended use: after obtaining a ticket file, import it so the current session can use it. However, there is no explicit guidance about when not to use it or which sibling tools to prefer instead.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.