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marc-shade

Security Scanner MCP Server

by marc-shade

scan_target

Scan a target URL or IP to uncover vulnerabilities with customizable severity filters. Adjust rate limit and timeout to suit scanning needs.

Instructions

Scan a target URL or IP with Nuclei vulnerability scanner.

Args: target: Target URL or IP address to scan severity: Comma-separated severity levels (info, low, medium, high, critical) rate_limit: Requests per second (default: 150) timeout: Scan timeout in seconds (default: 300)

Returns: JSON string with scan results

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
targetYes
timeoutNo
severityNomedium,high,critical
rate_limitNo

Output Schema

TableJSON Schema
NameRequiredDescriptionDefault
resultYes
Behavior2/5

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

No annotations provided; description lacks disclosure of potential destructive impact, required permissions, or behavioral nuances beyond basic parameters.

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?

Two sentences + structured Args/Returns, no wasted words, front-loaded with core action.

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?

Covers basic function, parameters, and return format, but lacks deeper context about when to use versus siblings, potential side effects, or required setup.

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

Parameters4/5

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

Schema has 0% coverage, but description explains each parameter meaningfully (e.g., severity levels, rate_limit as requests per second, timeout duration).

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?

Clearly states 'Scan a target URL or IP with Nuclei vulnerability scanner' – specific verb and resource, distinct from siblings like list_scans or get_scan_results.

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?

Implies scanning usage but gives no explicit when-to-use, when-not-to-use, or alternatives among 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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