clear_codegen_session

THE RISK

Critical Risk

Why clear_codegen_session needs a policy

'Clear' implies irreversibly discarding the accumulated session data (recorded actions, state) without generating output. This cannot be undone once the session data is gone, making it Destructive. Severity is medium as it only affects a codegen session, not production data or systems.

From the tool's definition Clear a code generation session without generating a test

Documented attack patterns abuse exactly the kind of access clear_codegen_session gives an agent:

POLICY

How to control clear_codegen_session

PolicyLayer is an MCP gateway — it sits between your AI agents and Playwright MCP Server, and nothing reaches the server without passing your rules. This is the rule we recommend for clear_codegen_session:

policy.json

{
  "version": "1",
  "default": "deny",
  "hide": [
    "clear_codegen_session"
  ]
}

clear_codegen_session disappears from the agent's tool list entirely, and any attempt to call it is denied. The rest of the server keeps working.

Create a free account and register Playwright MCP Server — nothing to install.
Add this policy — paste it, or build it visually.
Point your MCP client (Claude, Cursor, anything) at your gateway URL.

RESTRICT THIS TOOL →

Free to start. No card required.

EXPLORE

Related tools and policies

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All 29 Playwright MCP Server tools →

Destructive tools on other servers

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Go deeper

Critical-risk tools in Playwright MCP Server → Every critical-risk tool this server exposes, in one view.
All critical-risk MCP tools → Every critical-risk tool across the catalogue, and the policy pattern that contains them.
The MCP Attack Database → Documented attack patterns against MCP deployments — and the policies that stop them.
Blast radius → How much damage one compromised or confused agent can do — and how to bound it.
Tool call approval → Approval gates on individual tool calls: auto-allow, prompt, or deny.
Rate Limiting MCP Tool Calls: A Practical Guide →
MCP Security: Why Prompt Guardrails Aren't Enough →

FAQ

Questions about clear_codegen_session

What does the clear_codegen_session tool do? +

Clear a code generation session without generating a test. It is categorised as a Destructive tool in the Playwright MCP Server MCP Server, which means it can permanently delete or destroy data. Block by default and require explicit approval.

How do I enforce a policy on clear_codegen_session? +

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

What risk level is clear_codegen_session? +

clear_codegen_session is a Destructive tool with critical risk. Critical-risk tools should be blocked by default and only enabled with explicit human approval.

Can I rate-limit clear_codegen_session? +

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

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

clear_codegen_session is provided by the Playwright MCP Server MCP server (pvinis/mcp-playwright-stealth). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every Playwright MCP Server tool call.

Start from Playwright MCP Server, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.

CHECK YOUR STACK →