Clear browser cookies for testing authentication and session handling
AI agents call clear-browser-cookies to permanently remove resources in Debugger MCP Server — typically in cleanup and lifecycle workflows. It does its job in a single call, and there is no undo.
Clearing browser cookies permanently removes stored session and authentication data. This cannot be undone once executed — the cookies are gone. This could disrupt active sessions, log users out, and destroy session state irreversibly, making it a Destructive action with high severity since misuse could break authentication flows and terminate active user sessions across a testing environment.
From the tool's definition 'Clear browser cookies' - clearing cookies is an irreversible action that destroys authentication tokens, session data, and other stored cookie information
Attacks that exploit this kind of access
Clear browser cookies for testing authentication and session handling. It is categorised as a Destructive tool in the Debugger MCP Server MCP Server, which means it can permanently delete or destroy data. Block by default and require explicit approval.
Register the Debugger MCP Server MCP server in PolicyLayer and add a rule for clear-browser-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 Debugger MCP Server. Nothing to install.
clear-browser-cookies is a Destructive tool with critical risk. Critical-risk tools should be blocked by default and only enabled with explicit human approval.
Yes. Add a rate_limit block to the clear-browser-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.
Set action: deny in the PolicyLayer policy for clear-browser-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.
clear-browser-cookies is provided by the Debugger MCP Server MCP server (phoenixrr2113/debugger-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Every MCP server has a record like this.
Type a name, get the same breakdown: verified identity, auth posture, risk grade, capabilities, recommended policy.
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