{"record":{"id":"0588c9e8f7844074","repo":"googleapis/mcp-toolbox","slug":"bucket-cannot-be-empty-for-tool-q-0588c9","errorCode":null,"errorMessage":"bucket cannot be empty for tool %q","messagePattern":"bucket cannot be empty for tool %q","errorType":"validation","errorClass":null,"httpStatus":null,"severity":"error","filePath":"internal/tools/cloudstorage/cloudstorageuploadobject/cloudstorageuploadobject.go","lineNumber":77,"sourceCode":"\tType             string                 `yaml:\"type\" validate:\"required\"`\n\tSource           string                 `yaml:\"source\" validate:\"required\"`\n\tAnnotations      *tools.ToolAnnotations `yaml:\"annotations,omitempty\"`\n\tBucket           *string                `yaml:\"bucket,omitempty\"`\n}\n\n// validate interface\nvar _ tools.ToolConfig = Config{}\n\nfunc (cfg Config) ToolConfigType() string {\n\treturn resourceType\n}\n\nfunc (cfg Config) Initialize(context.Context) (tools.Tool, error) {\n\tif cfg.Description == \"\" {\n\t\treturn nil, fmt.Errorf(\"description is required for tool %q\", cfg.Name)\n\t}\n\tif cfg.Bucket != nil && *cfg.Bucket == \"\" {\n\t\treturn nil, fmt.Errorf(\"bucket cannot be empty for tool %q\", cfg.Name)\n\t}\n\n\tobjectParam := parameters.NewStringParameter(objectKey, \"Full object name (path) within the bucket, e.g. 'path/to/file.txt'.\")\n\tsourceParam := parameters.NewStringParameter(sourceKey, \"Absolute local filesystem path of the file to upload. Relative paths and paths containing '..' are rejected.\")\n\tcontentTypeParam := parameters.NewStringParameter(contentTypeKey, \"MIME type to record on the uploaded object. When empty, it is inferred from the source file's extension; if that fails, Cloud Storage auto-detects from the first 512 bytes of content.\", parameters.WithStringDefault(\"\"))\n\tallParameters := parameters.Parameters{}\n\tif cfg.Bucket == nil {\n\t\tallParameters = append(allParameters, parameters.NewStringParameter(bucketKey, \"Name of the Cloud Storage bucket to upload into.\"))\n\t}\n\tallParameters = append(allParameters, objectParam, sourceParam, contentTypeParam)\n\n\treturn Tool{\n\t\tBaseTool: tools.NewBaseTool(\n\t\t\tcfg,\n\t\t\ttools.GetAnnotationsOrDefault(cfg.Annotations, tools.NewDestructiveAnnotations),\n\t\t\ttools.Manifest{Description: cfg.Description, Parameters: allParameters.Manifest(), AuthRequired: cfg.AuthRequired},\n\t\t\tallParameters,\n\t\t),","sourceCodeStart":59,"sourceCodeEnd":95,"githubUrl":"https://github.com/googleapis/mcp-toolbox/blob/8cc6e09de2ad7b8bffc77751799585a1401a48eb/internal/tools/cloudstorage/cloudstorageuploadobject/cloudstorageuploadobject.go#L59-L95","documentation":"Configuration-time validation in Initialize: the upload tool's optional bucket override is present in tools.yaml but set to an empty string, leaving the tool with no usable bucket default.","triggerScenarios":"Thrown at internal/tools/cloudstorage/cloudstorageuploadobject/cloudstorageuploadobject.go:77 when the library encounters an invalid state.","commonSituations":"See trigger scenarios.","solutions":["Set bucket to a real bucket name in the tool configuration","Remove the bucket key entirely if the bucket will be supplied per invocation"],"exampleFix":null,"handlingStrategy":"validation","validationCode":null,"typeGuard":null,"tryCatchPattern":null,"preventionTips":[],"tags":[],"backgroundTag":null,"analyzedSha":"8cc6e09de2ad7b8bffc77751799585a1401a48eb","analyzedAt":"2026-09-05T01:10:36.887Z","contentChangedAt":"2026-09-05T01:10:36.887Z","schemaVersion":2},"datasetVersion":"2026-09-08T10:18:20.063Z"}