{"record":{"id":"65a10e016d06708a","repo":"googleapis/mcp-toolbox","slug":"invalid-source-for-q-tool-source-q-is-not-a-com-65a10e","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/dataproc/dataprocgetcluster/dataprocgetcluster.go","lineNumber":101,"sourceCode":"var _ tools.Tool = Tool{}\n\n// Tool is the implementation of the tool.\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\ntype compatibleSource interface {\n\tGetCluster(context.Context, string) (any, error)\n}\n\n// Invoke executes the tool's operation.\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\tparamMap := params.AsMap()\n\tname, ok := paramMap[\"clusterName\"].(string)\n\tif !ok {\n\t\treturn nil, util.NewAgentError(\"missing required parameter: clusterName\", nil)","sourceCodeStart":83,"sourceCodeEnd":119,"githubUrl":"https://github.com/googleapis/mcp-toolbox/blob/8cc6e09de2ad7b8bffc77751799585a1401a48eb/internal/tools/dataproc/dataprocgetcluster/dataprocgetcluster.go#L83-L119","documentation":"Source-compatibility check in ValidateSource: the configured source does not implement the GetCluster-compatible Dataproc interface, so the get-cluster tool is bound to a source that cannot fetch Dataproc clusters.","triggerScenarios":"Thrown at internal/tools/dataproc/dataprocgetcluster/dataprocgetcluster.go:101 when the library encounters an invalid state.","commonSituations":"See trigger scenarios.","solutions":["Point the tool's source field at a dataproc source instance","Verify the source kind in tools.yaml matches the Dataproc 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"}