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schwarztim

john-the-ripper-mcp

by schwarztim

john_pot

Show, clear, export, or search the john.pot file containing cracked password hashes and their plaintext values.

Instructions

Manage the john.pot file containing cracked passwords

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
actionYesAction to perform: show (list contents), clear (empty pot), export (output all)
searchNoSearch for specific hash or password in pot file
Behavior2/5

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

With no annotations, the description carries the full burden of behavioral disclosure. It does not disclose that the 'clear' action is destructive and irreversible, nor does it mention output formats or side effects. The only added context is 'containing cracked passwords', which is minimal. This is a significant gap for a tool with a destructive action.

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

Conciseness4/5

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

The description is a single sentence with no redundant words, making it efficient and well-structured. However, its brevity contributes to vagueness, so it does not earn a 5, but it is appropriately sized for the minimal information it conveys.

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

Completeness2/5

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

Given the tool includes a destructive 'clear' action, no annotations, and no output schema, the description is incomplete. It fails to mention the destructive nature, the difference between 'show' and 'export', or any prerequisites. The schema partially mitigates this, but the overall context remains insufficient for safe and correct usage.

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?

The input schema provides 100% coverage with descriptions for both parameters (action enum and search). The description adds no extra parameter semantics beyond what the schema already states, so it meets the baseline for high schema coverage but does not exceed it.

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

Purpose3/5

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

The description identifies the resource (john.pot file) and its content (cracked passwords), but the verb 'Manage' is vague and does not specify the concrete operations (show, clear, export) that the schema defines. It also fails to distinguish this from sibling tools like john_show, which likely overlaps with the 'show' action.

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

Usage Guidelines2/5

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

No guidance is provided on when to use this tool versus alternatives such as john_show, john_crack, or john_status. There is no mention of contexts where this tool is preferred, nor any exclusions or references to sibling tools.

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

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