Fix #585

Signed-off-by: David Gageot <[email protected]>

Author: dgageot

pkg/tools/builtin/script_shell.go

@@ -104,8 +104,10 @@ func (t *ScriptShellTool) Tools(context.Context) ([]tools.Tool, error) {
 
 func (t *ScriptShellTool) execute(ctx context.Context, toolConfig *latest.ScriptShellToolConfig, toolCall tools.ToolCall) (*tools.ToolCallResult, error) {
 	var params map[string]any
-	if err := json.Unmarshal([]byte(toolCall.Function.Arguments), &params); err != nil {
-		return nil, fmt.Errorf("invalid arguments: %w", err)
+	if toolCall.Function.Arguments != "" {
+		if err := json.Unmarshal([]byte(toolCall.Function.Arguments), &params); err != nil {
+			return nil, fmt.Errorf("invalid arguments: %w", err)
+		}
 	}
 
 	// Use default shell