diff --git a/pkg/tools/execute/server.go b/pkg/tools/execute/server.go
index 9352ccf..0c2c408 100644
--- a/pkg/tools/execute/server.go
+++ b/pkg/tools/execute/server.go
@@ -306,7 +306,9 @@ func (e *Server) callPromotedTool(ctx context.Context, tool string, args json.Ra
 		e.wdMu.RLock()
 		workDir := e.cwd
 		e.wdMu.RUnlock()
-		result, err = e.executeElevated(ctx, code, workDir, 30)
+		// Broker protocol has no stdin support; pipe JSON via heredoc.
+		elevatedCode := fmt.Sprintf("cat <<'OLLIE_EOF' | %s\n%s\nOLLIE_EOF", code, stdinData)
+		result, err = e.executeElevated(ctx, elevatedCode, workDir, 30)
 	} else {
 		result, err = e.executeWithStdin(ctx, code, "bash", 30, "default", false, stdinData)
 	}