set_cookie

Sets a cookie via the CDP Network domain. Either

SERVERJs Reverse SOURCE1600822305/js-reverse-mcp

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/1600822305-js-reverse-mcp/set-cookie.md

WHAT IT DOES

What set_cookie does on Js Reverse

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

RISK

Why set_cookie is rated Medium

This tool creates or modifies cookies in the browser context. While cookies are reversible (they can be cleared), they represent state changes that persist across requests and can affect subsequent browser behavior. This is a Write operation rather than Execute because it modifies data structures rather than executing arbitrary code.

From the tool's definition Tool name 'set_cookie' and description 'Sets a cookie via the CDP Network domain' indicate modification of browser state through cookie creation/modification.

Attacks that exploit this kind of access

RECOMMENDED RULE

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

set_cookie Rate-limited

set_cookie 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": {
    "set_cookie": {
      "limits": [
        {
          "counter": "set_cookie_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 Js Reverse, apply this rule, and every set_cookie call is checked against it from then on.

FAQ

Questions about set_cookie

What does the set_cookie tool do? +

Sets a cookie via the CDP Network domain. Either. It is categorised as a Write tool in the Js Reverse MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on set_cookie? +

Register the Js Reverse MCP server in PolicyLayer and add a rule for set_cookie: 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 set_cookie? +

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

Can I rate-limit set_cookie? +

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

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

set_cookie 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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