{"record":{"id":"1d65167ad5b47fd7","repo":"googleapis/mcp-toolbox","slug":"tool-type-q-already-registered-1d6516","errorCode":null,"errorMessage":"tool type %q already registered","messagePattern":"tool type %q already registered","errorType":"panic","errorClass":null,"httpStatus":null,"severity":"error","filePath":"internal/tools/cockroachdb/cockroachdblisttables/cockroachdblisttables.go","lineNumber":107,"sourceCode":"\t\t\t\t'object_name', ti.table_name,\n\t\t\t\t'object_type', CASE ti.object_kind\n\t\t\t\t\t\t\t\tWHEN 'r' THEN 'TABLE'\n\t\t\t\t\t\t\t\tWHEN 'p' THEN 'PARTITIONED TABLE'\n\t\t\t\t\t\t\t\tELSE ti.object_kind::text\n\t\t\t\t\t\t\tEND,\n\t\t\t\t'owner', ti.table_owner,\n\t\t\t\t'comment', ti.table_comment,\n\t\t\t\t'columns', COALESCE((SELECT json_agg(json_build_object('column_name',ci.column_name,'data_type',ci.data_type,'ordinal_position',ci.column_ordinal_position,'is_not_nullable',ci.is_not_nullable,'column_default',ci.column_default,'column_comment',ci.column_comment) ORDER BY ci.column_ordinal_position) FROM columns_info ci WHERE ci.table_oid = ti.table_oid), '[]'::json),\n\t\t\t\t'constraints', COALESCE((SELECT json_agg(json_build_object('constraint_name',cons.constraint_name,'constraint_type',cons.constraint_type,'constraint_definition',cons.constraint_definition,'constraint_columns',cons.constraint_columns,'foreign_key_referenced_table',cons.foreign_key_referenced_table,'foreign_key_referenced_columns',cons.foreign_key_referenced_columns)) FROM constraints_info cons WHERE cons.table_oid = ti.table_oid), '[]'::json),\n\t\t\t\t'indexes', COALESCE((SELECT json_agg(json_build_object('index_name',ii.index_name,'index_definition',ii.index_definition,'is_unique',ii.is_unique,'is_primary',ii.is_primary,'index_method',ii.index_method,'index_columns',ii.index_columns)) FROM indexes_info ii WHERE ii.table_oid = ti.table_oid), '[]'::json)\n\t\t\t) \n\t\tEND AS object_details\n\tFROM table_info ti ORDER BY ti.schema_name, ti.table_name;\n`\n\nfunc init() {\n\tif !tools.Register(resourceType, newConfig) {\n\t\tpanic(fmt.Sprintf(\"tool type %q already registered\", resourceType))\n\t}\n}\n\nfunc newConfig(ctx context.Context, name string, decoder *yaml.Decoder) (tools.ToolConfig, error) {\n\tactual := Config{ConfigBase: tools.ConfigBase{Name: name}}\n\tif err := decoder.DecodeContext(ctx, &actual); err != nil {\n\t\treturn nil, err\n\t}\n\treturn actual, nil\n}\n\ntype compatibleSource interface {\n\tQuery(ctx context.Context, sql string, args ...interface{}) (pgx.Rows, error)\n}\n\nvar _ compatibleSource = &cockroachdb.Source{}\n\ntype Config struct {","sourceCodeStart":89,"sourceCodeEnd":125,"githubUrl":"https://github.com/googleapis/mcp-toolbox/blob/8cc6e09de2ad7b8bffc77751799585a1401a48eb/internal/tools/cockroachdb/cockroachdblisttables/cockroachdblisttables.go#L89-L125","documentation":"The package's init() registers the 'cockroachdb-list-tables' tool type in the global registry and panics if tools.Register returns false, meaning the type string was already claimed. This is a duplicate-registration guard for programming errors (e.g. a vendored or duplicated package copy linked into the binary), not a user config issue.","triggerScenarios":"Thrown at internal/tools/cockroachdb/cockroachdblisttables/cockroachdblisttables.go:107 when the library encounters an invalid state.","commonSituations":"See trigger scenarios.","solutions":["Ensure the package is not imported twice under different paths (e.g. vendored and module copies)","Rename the conflicting resourceType constant if two distinct tools share it","Clean go.mod/go.sum and rebuild to eliminate stale duplicate dependencies"],"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"}