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Vinaysati
by Vinaysati

threatfoxMalware

Read-only

Search malware-family indicators of compromise using Malpedia naming (e.g., win.cobalt_strike) to map threats and support investigations.

Instructions

Search ThreatFox IOCs by malware family using Malpedia naming convention (e.g., "win.cobalt_strike", "win.emotet"). Requires ABUSECH_AUTH_KEY.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
limitNoMax results to return (1-1000, default 100)
malwareYesMalware family name in Malpedia format (e.g., win.cobalt_strike)

Schema Changelog

Changes observed during successful MCP inspections.

  1. First observedv0.3.0

TDQS

A3.6/5.0
Behavior3/5

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

Annotations already declare readOnlyHint=true, destructiveHint=false and openWorldHint=true, so the safety profile is covered. The description usefully adds the ABUSECH_AUTH_KEY requirement, which the annotations do not convey, but says nothing about result format or pagination.

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 tight sentences with zero waste; the core purpose is front-loaded and the auth prerequisite closes it without padding.

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

Completeness4/5

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

For a read-only search tool with full schema coverage and annotations carrying the safety profile, nothing critical is missing. The auth requirement is disclosed, and no output schema exists to explain further.

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%, so both parameters are already documented with the Malpedia format example. The description repeats that same naming convention rather than adding syntax or format details beyond the schema, so the baseline 3 is correct.

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?

States a specific verb (Search), resource (ThreatFox IOCs) and scope (by malware family), which an agent can distinguish from threatfoxSearch and threatfoxTag. It does not name those siblings explicitly, so it falls short of the 5 bar for differentiation.

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 'by malware family' phrasing implies when to use this over a general ThreatFox search, but no explicit when/when-not or alternative tool is named. Usage is left largely to inference.

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