Get open tabs from all synced devices.
AI agents call get_tabs_all_devices to retrieve information from Chromium Sync without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves sensitive user data (open tabs from all synced devices), revealing browsing activity, URLs visited, and potentially private information across the user's device ecosystem. While it is a Read operation with no side effects on data, the severity is high due to the sensitive nature of the data exposed and the cross-device scope.
From the tool's definition Tool name 'get_tabs_all_devices' and description 'Get open tabs from all synced devices' indicate retrieval of browser tab data across multiple devices. No modification, deletion, or execution capability is described.
Attacks that exploit this kind of access
Get open tabs from all synced devices. It is categorised as a Read tool in the Chromium Sync MCP Server, which means it retrieves data without modifying state.
Register the Chromium Sync MCP server in PolicyLayer and add a rule for get_tabs_all_devices: 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 Chromium Sync. Nothing to install.
get_tabs_all_devices 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 get_tabs_all_devices 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 get_tabs_all_devices. 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.
get_tabs_all_devices is provided by the Chromium Sync MCP server (jaidhyani/chromium-sync-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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