sourcemap_discover

Discover source maps on the current page.

SERVERJshookmcp SOURCE@jshookmcp/jshook

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/io-github-vmoranv-jshookmcp/sourcemap-discover.md

WHAT IT DOES

What sourcemap_discover does on Jshookmcp

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

RISK

Why sourcemap_discover is rated Low

Retrieves source map metadata from loaded page; no side effects or state changes.

From the tool's definition Discover source maps on the current page.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs sourcemap_discover safely

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

sourcemap_discover Allowed

sourcemap_discover 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": {
    "sourcemap_discover": {}
  }
}

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

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

FAQ

Questions about sourcemap_discover

What does the sourcemap_discover tool do? +

Discover source maps on the current page. It is categorised as a Read tool in the Jshookmcp MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on sourcemap_discover? +

Register the Jshook MCP server in PolicyLayer and add a rule for sourcemap_discover: 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 Jshookmcp. Nothing to install.

What risk level is sourcemap_discover? +

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

Can I rate-limit sourcemap_discover? +

Yes. Add a rate_limit block to the sourcemap_discover 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 sourcemap_discover completely? +

Set action: deny in the PolicyLayer policy for sourcemap_discover. 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 sourcemap_discover? +

sourcemap_discover is provided by the Jshook MCP server (@jshookmcp/jshook). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

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