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Kali Linux MCP Server

Kali Linux MCP Server

by AlessandroAnnini
OverviewSchemaSourceRelated ServersDiscussionsAdmin
Python
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jwt_security_test

Test JWT tokens for security vulnerabilities including none algorithm and weak secret attacks. Works with optional API endpoint for comprehensive testing.

Instructions

Test JWT token for security vulnerabilities (none algorithm, weak secrets)

Tool call template

Replace each placeholder with a value matching the input schema. Only required parameters are included; add optional parameters as needed.

{
  "id": 1,
  "jsonrpc": "2.0",
  "method": "tools/call",
  "params": {
    "arguments": {
      "token": "<token>"
    },
    "name": "jwt_security_test"
  }
}

Input Schema

NameRequiredDescriptionDefault
tokenYesJWT token to test
endpointNoAPI endpoint to test against (optional)

Schema Changelog

Changes observed during successful MCP inspections.

  1. First observedv0.1.0

TDQS

B3.4/5.0
Behavior2/5

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

No annotations are provided, so the description carries full burden. It mentions what vulnerabilities are tested but does not disclose behavioral traits such as whether the tool sends HTTP requests, modifies state, or requires authentication. For a security test tool, this is a significant gap.

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 that conveys the core purpose efficiently. It is concise but could benefit from more structured formatting (e.g., bullet points for clarity).

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?

Given no output schema and two parameters, the description is minimally adequate but lacks details on return values, error handling, or behavioral context. For a security testing tool, more completeness is expected.

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 description coverage is 100% (both token and endpoint are described). The description adds no additional insight beyond the schema, so baseline score of 3 is appropriate.

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

Purpose5/5

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

The description clearly states the tool's purpose: testing JWT tokens for specific vulnerabilities (none algorithm, weak secrets). The verb 'Test' and resource 'JWT token' are explicit, and it distinguishes from siblings like jwt_decode, which decodes tokens.

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 description implies the tool is for security testing but provides no explicit guidance on when to use it versus alternatives (e.g., jwt_decode for decoding, or other scanners for different vulnerabilities). No when-to-use or when-not-to-use context is given.

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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