page_script_register

SERVERJshookmcp SOURCE@jshookmcp/jshook

Medium RISK CLASS

Category Write

Parameters 00 required

Recommended Rate-limitedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/io-github-vmoranv-jshookmcp/page-script-register.md

WHAT IT DOES

What page_script_register does on Jshookmcp

AI agents use page_script_register to create or update resources in Jshookmcp, usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Jshookmcp environment.

RISK

Why page_script_register is rated Medium

Creates persistent JavaScript code artifacts that later execute in browser contexts, enabling arbitrary script injection and execution.

From the tool's definition Register a named reusable JS snippet in the Script Library

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs page_script_register 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 page_script_register, this is the rule to start with:

page_script_register Rate-limited

page_script_register stays usable, but capped: an agent stuck in a loop can't make hundreds of changes a minute. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "page_script_register": {
      "limits": [
        {
          "counter": "page_script_register_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

LIMIT THIS TOOL → Instant setup, no code required.

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

FAQ

Questions about page_script_register

What does the page_script_register tool do? +

Register a named reusable JS snippet in the Script Library. Execute with page_script_run. It is categorised as a Write tool in the Jshookmcp MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on page_script_register? +

Register the Jshook MCP server in PolicyLayer and add a rule for page_script_register: 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 page_script_register? +

page_script_register is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.

Can I rate-limit page_script_register? +

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

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

page_script_register 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.

KEEP EXPLORING

More on Jshook, and thousands of servers like it.

This server

All 736 Jshook tools →

Across the catalogue

team_manager_register_agents on Team Manager MCP → The MCP Attack Database →

Guides

Govern customer-ops agents →Argument validation →Scoped token →