High-risk tools in Arc Browser MCP
4 of the 13 tools in Arc Browser MCP are classified as high risk. This page profiles those tools specifically, with recommended policy actions and the attack patterns that target them.
Every operation listed below is an action PolicyLayer recommends controlling at the transport layer. Open any tool to see the full profile, risk score, and YAML policy snippet.
Tools at high risk
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arc_execute_javascriptExecuteExecute JavaScript in an Arc tab. Disabled unless ARC_MCP_ENABLE_JAVASCRIPT=1.
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arc_focus_spaceExecuteFocus an Arc Space by explicit id. This changes visible Arc state.
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arc_reload_tabsExecuteReload one or more Arc tabs by explicit tab id.
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arc_select_tabExecuteSelect an Arc tab by explicit id. This changes visible Arc state.
Attacks that target this class
High-risk tools in any server share these documented attack patterns. Each links to the full case and the defensive policy.