googleapis/mcp-toolbox · error

invalid value for maxDelay: %w

Error message

invalid value for maxDelay: %w

What it means

Initialize failed to parse the tool's `maxDelay` field with time.ParseDuration — the string is not a valid Go duration format.

Source

Thrown at internal/tools/cloudsql/cloudsqlwaitforoperation/cloudsqlwaitforoperation.go:143

	var delay time.Duration
	if cfg.Delay == "" {
		delay = 3 * time.Second
	} else {
		var err error
		delay, err = time.ParseDuration(cfg.Delay)
		if err != nil {
			return nil, fmt.Errorf("invalid value for delay: %w", err)
		}
	}

	var maxDelay time.Duration
	if cfg.MaxDelay == "" {
		maxDelay = 4 * time.Minute
	} else {
		var err error
		maxDelay, err = time.ParseDuration(cfg.MaxDelay)
		if err != nil {
			return nil, fmt.Errorf("invalid value for maxDelay: %w", err)
		}
	}

	multiplier := cfg.Multiplier
	if multiplier == 0 {
		multiplier = 2.0
	}

	maxRetries := cfg.MaxRetries
	if maxRetries == 0 {
		maxRetries = 10
	}

	params := buildParams("")
	return Tool{
		BaseTool: tools.NewBaseTool(
			cfg,
			tools.GetAnnotationsOrDefault(cfg.Annotations, tools.NewReadOnlyAnnotations),

View on GitHub (pinned to 8cc6e09de2)

Solutions

1. Set maxDelay to a valid duration string such as 4m
2. Check for typos and missing time units
3. Omit maxDelay to use the 4m default

When it happens

Trigger: Thrown at internal/tools/cloudsql/cloudsqlwaitforoperation/cloudsqlwaitforoperation.go:143 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/19bd68db4022bae7. Report an issue: GitHub.