{"record":{"id":"6f0b5dd014c4593a","repo":"googleapis/mcp-toolbox","slug":"invalid-source-for-q-tool-source-q-is-not-a-com-6f0b5d","errorCode":null,"errorMessage":"invalid source for %q tool: source %q is not a compatible type","messagePattern":"invalid source for %q tool: source %q is not a compatible type","errorType":"validation","errorClass":null,"httpStatus":null,"severity":"error","filePath":"internal/tools/cloudstorage/cloudstoragewriteobject/cloudstoragewriteobject.go","lineNumber":115,"sourceCode":"\nvar _ tools.Tool = Tool{}\n\ntype Tool struct {\n\ttools.BaseTool[Config]\n}\n\nfunc (t Tool) GetSourceName() string {\n\treturn t.Cfg.Source\n}\n\nfunc (t Tool) ToConfig() tools.ToolConfig {\n\treturn t.Cfg\n}\n\nfunc (t Tool) ValidateSource(source sources.Source) error {\n\t_, ok := source.(compatibleSource)\n\tif !ok {\n\t\treturn fmt.Errorf(\"invalid source for %q tool: source %q is not a compatible type\", t.Cfg.Type, t.Cfg.Source)\n\t}\n\treturn nil\n}\n\nfunc (t Tool) Invoke(ctx context.Context, s sources.Source, params parameters.ParamValues, accessToken tools.AccessToken) (any, util.ToolboxError) {\n\tsource, ok := s.(compatibleSource)\n\tif !ok {\n\t\treturn nil, util.NewClientServerError(\"source used is not compatible with the tool\", http.StatusInternalServerError, nil)\n\t}\n\tmapParams := params.AsMap()\n\tbucket := cloudstoragecommon.ResolveString(t.Cfg.Bucket, mapParams, bucketKey)\n\tif bucket == \"\" {\n\t\treturn nil, util.NewAgentError(fmt.Sprintf(\"invalid or missing '%s' parameter; expected a non-empty string\", bucketKey), nil)\n\t}\n\tobject, ok := mapParams[objectKey].(string)\n\tif !ok || object == \"\" {\n\t\treturn nil, util.NewAgentError(fmt.Sprintf(\"invalid or missing '%s' parameter; expected a non-empty string\", objectKey), nil)\n\t}","sourceCodeStart":97,"sourceCodeEnd":133,"githubUrl":"https://github.com/googleapis/mcp-toolbox/blob/8cc6e09de2ad7b8bffc77751799585a1401a48eb/internal/tools/cloudstorage/cloudstoragewriteobject/cloudstoragewriteobject.go#L97-L133","documentation":"Source-compatibility check in ValidateSource: the configured source does not implement the Cloud Storage compatibleSource interface, so the write-object tool cannot use it.","triggerScenarios":"Thrown at internal/tools/cloudstorage/cloudstoragewriteobject/cloudstoragewriteobject.go:115 when the library encounters an invalid state.","commonSituations":"See trigger scenarios.","solutions":["Point the tool's source field at a cloud-storage source instance","Verify the source kind in tools.yaml matches the Cloud Storage source"],"exampleFix":null,"handlingStrategy":"type-guard","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"}