browser_localstorage_get
A read tool on the Playwright MCP server.
This record as markdown: /tools/alialobidm-playwright-mcp/browser-localstorage-get.md
What browser_localstorage_get does on Playwright MCP
AI agents call browser_localstorage_get to retrieve information from Playwright MCP without modifying anything. It is typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
Why browser_localstorage_get is rated Low
This tool retrieves local storage data from a browser context. Retrieval operations have minimal blast radius—they expose data but do not modify, execute code, delete resources, or move money. Confidence is slightly reduced due to empty description, but the naming pattern is sufficiently clear.
From the tool's definition Tool name 'browser_localstorage_get' indicates a retrieval operation on browser local storage. The 'get' suffix and read-only verb pattern are consistent with Read category tools like the sibling 'browser_cookie_get' and 'browser_console_messages'.
Attacks that exploit this kind of access
The rule that runs browser_localstorage_get 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_localstorage_get, this is the rule to start with:
browser_localstorage_get is read-only, so it stays allowed. Everything else on the server is denied unless you say otherwise.
The button opens the PolicyLayer dashboard: create your workspace, connect Playwright MCP, apply this rule, and every browser_localstorage_get call is checked against it from then on.
Questions about browser_localstorage_get
browser_localstorage_get is a read tool on the Playwright MCP server. It is categorised as a Read tool in the Playwright MCP MCP Server, which means it retrieves data without modifying state.
Register the Playwright MCP server in PolicyLayer and add a rule for browser_localstorage_get: 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.
browser_localstorage_get is a Read tool with low risk. Read-only tools are generally safe to allow by default.
Yes. Add a rate_limit block to the browser_localstorage_get 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 browser_localstorage_get. 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.
browser_localstorage_get 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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