gau_discovery

A read tool on the Hexstrike Ai MCP server.

SERVERHexstrike Ai SOURCE0x4m4/hexstrike-ai

Low RISK CLASS

Category Read

Parameters 00 required

Recommended Allowedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/hexstrike-ai/gau-discovery.md

WHAT IT DOES

What gau_discovery does on Hexstrike Ai

AI agents call gau_discovery to retrieve information from Hexstrike Ai without modifying anything. It is typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.

RISK

Why gau_discovery is rated Low

'gau' (GetAllUrls) is a well-known passive reconnaissance tool that retrieves historical URLs from sources like Wayback Machine, Common Crawl, and OTX. It performs read-only data gathering with no side effects. However, the empty description reduces confidence. Severity is medium because URL discovery on this offensive security platform could feed into active attack workflows.

From the tool's definition Tool name 'gau_discovery' suggests use of the 'gau' (GetAllUrls) tool, which fetches known URLs for a domain from web archives and crawlers. Empty description lowers confidence.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs gau_discovery safely

PolicyLayer is an MCP gateway: it sits between your AI agents and Hexstrike Ai, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For gau_discovery, this is the rule to start with:

gau_discovery Allowed

gau_discovery is read-only, so it stays allowed. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "gau_discovery": {}
  }
}

ALLOW ONLY THIS TOOL → Instant setup, no code required.

The button opens the PolicyLayer dashboard: create your workspace, connect Hexstrike Ai, apply this rule, and every gau_discovery call is checked against it from then on.

FAQ

Questions about gau_discovery

What does the gau_discovery tool do? +

gau_discovery is a read tool on the Hexstrike Ai MCP server. It is categorised as a Read tool in the Hexstrike Ai MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on gau_discovery? +

Register the Hexstrike Ai MCP server in PolicyLayer and add a rule for gau_discovery: allow, deny, rate-limit, or require approval. Point your MCP client at the PolicyLayer proxy URL and the rule is enforced on every call, before it reaches Hexstrike Ai. Nothing to install.

What risk level is gau_discovery? +

gau_discovery is a Read tool with low risk. Read-only tools are generally safe to allow by default.

Can I rate-limit gau_discovery? +

Yes. Add a rate_limit block to the gau_discovery rule in your PolicyLayer policy. For example, setting max: 10 and window: 60 limits the tool to 10 calls per minute. Rate limits are tracked per agent session and reset automatically.

How do I block gau_discovery completely? +

Set action: deny in the PolicyLayer policy for gau_discovery. The AI agent will receive a policy violation error and cannot call the tool. You can also include a reason field to explain why the tool is blocked.

What MCP server provides gau_discovery? +

gau_discovery is provided by the Hexstrike Ai MCP server (0x4m4/hexstrike-ai). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

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