googleapis/mcp-toolbox · error

error in User Agent retrieval: %s

Error message

error in User Agent retrieval: %s

What it means

Error "error in User Agent retrieval: %s" thrown in googleapis/mcp-toolbox.

Source

Thrown at internal/sources/alloydbadmin/alloydbadmin.go:69

	return actual, nil
}

type Config struct {
	Name           string `yaml:"name" validate:"required"`
	Type           string `yaml:"type" validate:"required"`
	DefaultProject string `yaml:"defaultProject"`
	UseClientOAuth bool   `yaml:"useClientOAuth"`
	ReadOnly       bool   `yaml:"readOnly"`
}

func (r Config) SourceConfigType() string {
	return SourceType
}

func (r Config) Initialize(ctx context.Context, tracer trace.Tracer) (sources.Source, error) {
	ua, err := util.UserAgentFromContext(ctx)
	if err != nil {
		return nil, fmt.Errorf("error in User Agent retrieval: %s", err)
	}

	var client *http.Client
	if r.UseClientOAuth {
		client = &http.Client{
			Transport: util.NewUserAgentRoundTripper(ua, http.DefaultTransport),
		}
	} else {
		// Use Application Default Credentials
		creds, err := google.FindDefaultCredentials(ctx, alloydbrestapi.CloudPlatformScope)
		if err != nil {
			return nil, fmt.Errorf("failed to find default credentials: %w", err)
		}
		baseClient := oauth2.NewClient(ctx, creds.TokenSource)
		baseClient.Transport = util.NewUserAgentRoundTripper(ua, baseClient.Transport)
		client = baseClient
	}

View on GitHub (pinned to 8cc6e09de2)

When it happens

Trigger: Thrown at internal/sources/alloydbadmin/alloydbadmin.go:69 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of googleapis/mcp-toolbox@8cc6e09de2 (2026-09-05). Data as JSON: /api/errors/9b42d4d6408a789d. Report an issue: GitHub.