get_cookies

Get cookies for the current page or specified tab via the Chrome extension bridge.

SERVERAgent Browser SOURCE335234131/agent-browser-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/335234131-agent-browser-mcp/get-cookies.md

WHAT IT DOES

What get_cookies does on Agent Browser

AI agents call get_cookies to retrieve information from Agent Browser 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_cookies is rated Low

This tool retrieves cookie data from the browser—a read-only operation with no side effects on the system. However, severity is elevated to 'high' because cookies often contain sensitive authentication tokens, session identifiers, and personal data that could enable account compromise, session hijacking, or privacy violations if exfiltrated by a compromised agent.

From the tool's definition Tool name 'get_cookies' and description 'Get cookies for the current page or specified tab' indicate retrieval of data with no modification. The word 'Get' confirms query-only semantics.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs get_cookies safely

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

get_cookies Allowed

get_cookies 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_cookies": {}
  }
}

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

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

FAQ

Questions about get_cookies

What does the get_cookies tool do? +

Get cookies for the current page or specified tab via the Chrome extension bridge. It is categorised as a Read tool in the Agent Browser MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on get_cookies? +

Register the Agent Browser MCP server in PolicyLayer and add a rule for get_cookies: 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 Agent Browser. Nothing to install.

What risk level is get_cookies? +

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

Can I rate-limit get_cookies? +

Yes. Add a rate_limit block to the get_cookies 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_cookies completely? +

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

get_cookies is provided by the Agent Browser MCP server (335234131/agent-browser-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

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