{"record":{"id":"bea0f118f2151236","repo":"googleapis/mcp-toolbox","slug":"invalid-source-for-q-tool-source-q-is-not-a-com-bea0f1","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":"exception","errorClass":null,"httpStatus":null,"severity":"error","filePath":"internal/tools/looker/lookerswitchgitbranch/lookerswitchgitbranch.go","lineNumber":117,"sourceCode":"// validate interface\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\tsdk, err := source.GetLookerSDK(ctx, string(accessToken))\n\tif err != nil {\n\t\treturn nil, util.NewClientServerError(fmt.Sprintf(\"error getting sdk: %v\", err), http.StatusInternalServerError, err)\n\t}\n\n\tmapParams := params.AsMap()\n\tprojectId := mapParams[\"project_id\"].(string)\n\tbranch := mapParams[\"branch\"].(string)\n\tref := mapParams[\"ref\"].(string)","sourceCodeStart":99,"sourceCodeEnd":135,"githubUrl":"https://github.com/googleapis/mcp-toolbox/blob/8cc6e09de2ad7b8bffc77751799585a1401a48eb/internal/tools/looker/lookerswitchgitbranch/lookerswitchgitbranch.go#L99-L135","documentation":"ValidateSource type-asserts the resolved source against the tool's compatibleSource interface (Looker API access). The error fires when the tool is bound to a source that is not a Looker source, i.e. the tool kind and source kind in the YAML configuration are incompatible.","triggerScenarios":"Thrown at internal/tools/looker/lookerswitchgitbranch/lookerswitchgitbranch.go:117 when the library encounters an invalid state.","commonSituations":"See trigger scenarios.","solutions":["Point the tool's 'source' field at a Looker source defined in tools.yaml","Ensure the source's kind is 'looker' rather than an incompatible source type","Correct any typo in the source name that resolved to the wrong source"],"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"}