get_storage

SERVERJs Reverse SOURCE1600822305/js-reverse-mcp

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/1600822305-js-reverse-mcp/get-storage.md

WHAT IT DOES

What get_storage does on Js Reverse

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

RISK

Why get_storage is rated Low

This tool retrieves sensitive authentication tokens and session data (httpOnly cookies, localStorage, sessionStorage) from browser storage without modifying or deleting it.

From the tool's definition Tool description explicitly states it "Gets browser storage data" including cookies, localStorage, and sessionStorage. The verb "Gets" and "read" indicate data retrieval with no modification. No deletion, creation, or execution is described.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs get_storage safely

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

get_storage Allowed

get_storage 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": {
    "get_storage": {}
  }
}

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

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

FAQ

Questions about get_storage

What does the get_storage tool do? +

Gets browser storage data including cookies, localStorage, and sessionStorage. Cookies are read via the Chrome DevTools Protocol (Network.getCookies), so httpOnly cookies (where auth/session tokens usually live) are included, along with rich attributes (domain, path, httpOnly, secure, sameSite, expires, etc.). localStorage and sessionStorage are read from the page context. It is categorised as a Read tool in the Js Reverse MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on get_storage? +

Register the Js Reverse MCP server in PolicyLayer and add a rule for get_storage: 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 Js Reverse. Nothing to install.

What risk level is get_storage? +

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

Can I rate-limit get_storage? +

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

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

get_storage is provided by the Js Reverse MCP server (1600822305/js-reverse-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

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