diff --git a/packages/server/src/server/agent/providers/claude-agent.ts b/packages/server/src/server/agent/providers/claude-agent.ts
index 4761d75ad..0df04f891 100644
--- a/packages/server/src/server/agent/providers/claude-agent.ts
+++ b/packages/server/src/server/agent/providers/claude-agent.ts
@@ -540,7 +540,7 @@ class ClaudeAgentSession implements AgentSession {
       playwright: {
         type: "stdio",
         command: "npx",
-        args: ["@playwright/mcp", "--headless"],
+        args: ["@playwright/mcp", "--headless", "--isolated"],
       },
     };