AI agents call scout_tabs to retrieve information from Scout without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves metadata about currently open browser tabs (index, URL, title, active status). It is a read-only operation that queries state without modifying, executing, or deleting anything. The lowest severity is appropriate because the information exposed (tab URLs and titles) could reveal browsing history, but the tool itself performs no harmful action.
From the tool's definition Tool name 'scout_tabs' with description 'List all open browser tabs' indicates a query/retrieval operation with no modifications or side effects.
Attacks that exploit this kind of access
List all open browser tabs with their index, URL, title, and which is active. It is categorised as a Read tool in the Scout MCP Server, which means it retrieves data without modifying state.
Register the Scout MCP server in PolicyLayer and add a rule for scout_tabs: 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 Scout. Nothing to install.
scout_tabs 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 scout_tabs 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 scout_tabs. 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.
scout_tabs is provided by the Scout MCP server (lautrek/scout). 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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