googleapis/mcp-toolbox · error

array item %d: %w

Error message

array item %d: %w

What it means

Recursive wrap in JSONToFirestoreValue for arrayValue: converting one element of the array failed; the index and the wrapped error identify the offending element and its specific problem.

Source

Thrown at internal/tools/firestore/util/converter.go:114

						lat, latOk := geoMap["latitude"].(float64)
						lng, lngOk := geoMap["longitude"].(float64)
						if latOk && lngOk {
							return &latlng.LatLng{
								Latitude:  lat,
								Longitude: lng,
							}, nil
						}
					}
					return nil, fmt.Errorf("invalid geopoint value format")
				case "arrayValue":
					// Convert array
					if arrayMap, ok := val.(map[string]any); ok {
						if values, ok := arrayMap["values"].([]any); ok {
							result := make([]any, len(values))
							for i, item := range values {
								converted, err := JSONToFirestoreValue(item, client)
								if err != nil {
									return nil, fmt.Errorf("array item %d: %w", i, err)
								}
								result[i] = converted
							}
							return result, nil
						}
					}
					return nil, fmt.Errorf("invalid array value format")
				case "mapValue":
					// Convert map
					if mapMap, ok := val.(map[string]any); ok {
						if fields, ok := mapMap["fields"].(map[string]any); ok {
							result := make(map[string]any)
							for k, v := range fields {
								converted, err := JSONToFirestoreValue(v, client)
								if err != nil {
									return nil, fmt.Errorf("map field %q: %w", k, err)
								}
								result[k] = converted

View on GitHub (pinned to 8cc6e09de2)

Solutions

1. Fix the array element named by the index according to the wrapped error
2. Ensure every element carries a valid Firestore value tag

When it happens

Trigger: Thrown at internal/tools/firestore/util/converter.go:114 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/fb00d41747788798. Report an issue: GitHub.