{"record":{"id":"56ed8548802e70c7","repo":"vxcontrol/pentagi","slug":"unknown-tool-s","errorCode":null,"errorMessage":"unknown tool: %s","messagePattern":"unknown tool: (.+?)","errorType":"exception","errorClass":null,"httpStatus":null,"severity":"error","filePath":"backend/pkg/tools/browser.go","lineNumber":142,"sourceCode":"\t\t_, _ = b.scp.PutScreenshot(ctx, screen, url, b.taskID, b.subtaskID)\n\t}\n\treturn result, nil\n}\n\nfunc (b *browser) Handle(ctx context.Context, name string, args json.RawMessage) (string, error) {\n\tif !b.IsAvailable() {\n\t\treturn \"\", fmt.Errorf(\"browser is not available\")\n\t}\n\n\tvar action Browser\n\tlogger := logrus.WithContext(ctx).WithFields(enrichLogrusFields(b.flowID, b.taskID, b.subtaskID, logrus.Fields{\n\t\t\"tool\": name,\n\t\t\"args\": string(args),\n\t}))\n\n\tif name != \"browser\" {\n\t\tlogger.Error(\"unknown tool\")\n\t\treturn \"\", fmt.Errorf(\"unknown tool: %s\", name)\n\t}\n\n\tif err := json.Unmarshal(args, &action); err != nil {\n\t\tlogger.WithError(err).Error(\"failed to unmarshal browser action\")\n\t\treturn \"\", fmt.Errorf(\"failed to unmarshal browser action: %w\", err)\n\t}\n\n\t// LLMs occasionally wrap the URL with an incidental leading/trailing\n\t// newline, carriage return, or space (e.g. copy-pasted from command\n\t// output); net/url.Parse rejects control characters outright, failing the\n\t// whole call over whitespace that carries no meaning. Strip it here so it\n\t// never reaches resolveUrl.\n\taction.Url = strings.TrimSpace(action.Url)\n\n\tif action.Action == \"\" {\n\t\t// The LLM occasionally omits the required 'action' field even though the\n\t\t// tool schema marks it required. 'markdown' is the safest default: it is\n\t\t// the most commonly used and most versatile content format, so infer it","sourceCodeStart":124,"sourceCodeEnd":160,"githubUrl":"https://github.com/vxcontrol/pentagi/blob/ea665308baaff015b226f308438a68d929d0f29b/backend/pkg/tools/browser.go#L124-L160","documentation":"Error \"unknown tool: %s\" thrown in vxcontrol/pentagi.","triggerScenarios":"Thrown at backend/pkg/tools/browser.go:142 when the library encounters an invalid state.","commonSituations":"See trigger scenarios.","solutions":[],"exampleFix":null,"handlingStrategy":null,"validationCode":null,"typeGuard":null,"tryCatchPattern":null,"preventionTips":[],"tags":[],"backgroundTag":null,"analyzedSha":"ea665308baaff015b226f308438a68d929d0f29b","analyzedAt":"2026-09-01T14:16:31.421Z","contentChangedAt":null,"schemaVersion":2},"datasetVersion":"2026-09-08T10:18:20.063Z"}