browser_get_localstorage
A read tool on the Looking Glass MCP server.
This record as markdown: /tools/io-github-sahib-sawhney-wh-looking-glass-mcp/browser-get-localstorage.md
What browser_get_localstorage does on Looking Glass
AI agents call browser_get_localstorage to retrieve information from Looking Glass without modifying anything. It is typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
| Parameter | Type | Required | Description |
|---|---|---|---|
key | string | — | Specific key to retrieve (or omit for all) |
Parameters from the server's own tool schema.
Why browser_get_localstorage is rated Low
localStorage retrieval is a read operation that accesses stored browser data without side effects. Although the description is empty (lowering confidence slightly), the name clearly indicates data retrieval rather than write, execute, or destructive operations. Low severity because localStorage typically contains non-sensitive application state, though confidence is moderated due to lack of explicit documentation.
From the tool's definition Tool name 'browser_get_localstorage' indicates retrieval of localStorage data from the browser. The 'get' prefix strongly suggests a read operation that queries existing data without modification.
Attacks that exploit this kind of access
The rule that runs browser_get_localstorage safely
PolicyLayer is an MCP gateway: it sits between your AI agents and Looking Glass, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For browser_get_localstorage, this is the rule to start with:
browser_get_localstorage 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 Looking Glass, apply this rule, and every browser_get_localstorage call is checked against it from then on.
Questions about browser_get_localstorage
browser_get_localstorage is a read tool on the Looking Glass MCP server. It is categorised as a Read tool in the Looking Glass MCP Server, which means it retrieves data without modifying state.
browser_get_localstorage accepts 1 parameter: key. The full parameter table on this page comes from the server's own tool schema.
Register the Looking Glass MCP server in PolicyLayer and add a rule for browser_get_localstorage: 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 Looking Glass. Nothing to install.
browser_get_localstorage 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_get_localstorage 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_get_localstorage. 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_get_localstorage is provided by the Looking Glass MCP server (looking-glass-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
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