diff --git a/internal/mcp/tools/spark_submit.go b/internal/mcp/tools/spark_submit.go
index c9e6489..4be2493 100644
--- a/internal/mcp/tools/spark_submit.go
+++ b/internal/mcp/tools/spark_submit.go
@@ -176,6 +176,8 @@ func (d *Deps) SparkSubmitHandler(ctx context.Context, req mcp.CallToolRequest)
 		// Even on error, result carries ExitCode/Stderr for the LLM.
 		if result != nil {
 			callLog.WithResult(map[string]any{
+				"binary":      binary,
+				"argv":        cmd,
 				"app_id":      result.AppID,
 				"exit_code":   result.ExitCode,
 				"duration_ms": result.DurationMS,
@@ -193,6 +195,8 @@ func (d *Deps) SparkSubmitHandler(ctx context.Context, req mcp.CallToolRequest)
 	}
 
 	callLog.WithResult(map[string]any{
+		"binary":      binary,
+		"argv":        cmd,
 		"app_id":      result.AppID,
 		"exit_code":   result.ExitCode,
 		"duration_ms": result.DurationMS,