Critical-risk tools in MCP Browser Tabs Server

Critical severity MCP Browser Tabs Server MCP Server 2 of 4 tools

2 of the 4 tools in MCP Browser Tabs Server are classified as critical 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 critical risk

close_tab Destructive

⚠️ LEGACY DANGER: Close a specific tab using window/tab index. HIGH RISK of closing wrong tabs due to index shifting when tabs are reordered/closed. STRONGLY DEPRECATED: Use clo...
close_tab_by_id Destructive

🔥 PREFERRED METHOD: Close a specific tab in Google Chrome using its unique tab ID. IMMUNE to tab reordering, window changes, and index shifting. Extract the Tab ID from [Tab ID...

Attacks that target this class

Critical-risk tools in any server share these documented attack patterns. Each links to the full case and the defensive policy.

Destructive Action Autonomy
Privilege escalation via admin-only tools
Data exfiltration via tool chaining
Runaway Tool Loops

Critical-risk tools in MCP Browser Tabs Server

Tools at critical risk

Attacks that target this class

More on MCP Browser Tabs Server

Enforce policy on every MCP Browser Tabs Server tool call.