Update server/internal/hooks/pending_helpers.go

Co-authored-by: devin-ai-integration[bot] <158243242+devin-ai-integration[bot]@users.noreply.github.com>

Author: chase-crumbaugh

server/internal/hooks/pending_helpers.go

@@ -98,6 +98,10 @@ func (s *Service) buildTelemetryAttributesWithMetadata(payload *gen.ClaudePayloa
 		attr.HookSourceKey:     hookSource,
 	}
 
+	if payload.ToolError != nil {
+		attrs[attr.HookErrorKey] = payload.ToolError
+	}
+
 	// Parse MCP tool names
 	if strings.HasPrefix(toolName, "mcp__") {
 		parts := strings.SplitN(toolName, "__", 3)