browser_sessionstorage_delete

A destructive tool on the Playwright MCP server.

SERVERPlaywright MCP SOURCEalialobidm/playwright-mcp

Critical RISK CLASS

Category Destructive

Parameters 00 required

Recommended Hiddensee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/alialobidm-playwright-mcp/browser-sessionstorage-delete.md

WHAT IT DOES

What browser_sessionstorage_delete does on Playwright MCP

AI agents call browser_sessionstorage_delete to permanently remove resources in Playwright MCP, typically in cleanup and lifecycle workflows. It does its job in a single call, and there is no undo.

RISK

Why browser_sessionstorage_delete is rated Critical

The 'delete' operation is inherently destructive—it permanently removes session storage data that cannot be recovered. While the blast radius is limited to the current browser session and would typically affect only the target website's stored data (not system-wide), unauthorized deletion of user session data, authentication tokens, or application state constitutes irreversible data loss.

From the tool's definition Tool name includes 'delete' applied to browser session storage, indicating irreversible removal of data. The 'browser_' prefix and context within Playwright MCP browser automation server confirms this operates on web storage.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs browser_sessionstorage_delete safely

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

browser_sessionstorage_delete Hidden

browser_sessionstorage_delete is removed from the agent's tool list entirely, so the agent never calls it. The rest of the server keeps working.

View as policy code

policy.json

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

RESTRICT THIS TOOL → Instant setup, no code required.

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

FAQ

Questions about browser_sessionstorage_delete

What does the browser_sessionstorage_delete tool do? +

browser_sessionstorage_delete is a destructive tool on the Playwright MCP server. It is categorised as a Destructive tool in the Playwright MCP 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 browser_sessionstorage_delete? +

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

What risk level is browser_sessionstorage_delete? +

browser_sessionstorage_delete 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 browser_sessionstorage_delete? +

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

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

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

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