cloak_save_storage_state · CloakBrowser MCP Server MCP

WHAT IT DOES

What cloak_save_storage_state does on CloakBrowser MCP Server

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

WHY IT NEEDS A POLICY

Why cloak_save_storage_state needs a policy

This tool exports browser storage (cookies, localStorage) to a file. While the export itself is not destructive or directly harmful, it creates/writes a new data artifact. The act of persisting sensitive session data (cookies, localStorage) to a file could enable session hijacking or credential reuse if the file is not properly secured.

From the tool's definition Tool description states it 'Save[s] browser storage state (cookies, localStorage) to a JSON file.' This is a write operation that creates/persists data (storage state export). The verb 'save' and the target 'to a JSON file' indicate data creation/modification.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

cloak_save_storage_state Rate-limited

cloak_save_storage_state 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": {
    "cloak_save_storage_state": {
      "limits": [
        {
          "counter": "cloak_save_storage_state_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

LIMIT THIS TOOL →

Instant setup, no code required.

PolicyLayer is an MCP gateway: every tool call is checked against your rule before it reaches CloakBrowser MCP Server, so you can run agents against it safely.

FAQ

Questions about cloak_save_storage_state

What does the cloak_save_storage_state tool do? +

Save browser storage state (cookies, localStorage) to a JSON file. It is categorised as a Write tool in the CloakBrowser MCP Server MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on cloak_save_storage_state? +

Register the CloakBrowser MCP Server MCP server in PolicyLayer and add a rule for cloak_save_storage_state: 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 CloakBrowser MCP Server. Nothing to install.

What risk level is cloak_save_storage_state? +

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

Can I rate-limit cloak_save_storage_state? +

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

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

cloak_save_storage_state is provided by the CloakBrowser MCP Server MCP server (miwoomiwoo/cloakbrowser-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.