{"record":{"id":"1e8a9b0308411fc2","repo":"amir20/dozzle","slug":"failed-to-parse-arguments-w","errorCode":null,"errorMessage":"failed to parse arguments: %w","messagePattern":"failed to parse arguments: %w","errorType":"validation","errorClass":null,"httpStatus":null,"severity":"warning","filePath":"internal/cloud/tools_actions.go","lineNumber":20,"sourceCode":"\nimport (\n\t\"context\"\n\t\"encoding/json\"\n\t\"fmt\"\n\n\t\"github.com/amir20/dozzle/internal/container\"\n\tpb \"github.com/amir20/dozzle/proto/cloud\"\n)\n\ntype containerActionArgs struct {\n\tContainerID string `json:\"container_id\"`\n\tHost        string `json:\"host_id\"`\n}\n\nfunc executeContainerAction(ctx context.Context, name string, argsJSON string, deps ToolDeps) (*pb.CallToolResponse, error) {\n\tvar args containerActionArgs\n\tif err := json.Unmarshal([]byte(argsJSON), &args); err != nil {\n\t\treturn nil, fmt.Errorf(\"failed to parse arguments: %w\", err)\n\t}\n\n\taction, err := resolveAction(name)\n\tif err != nil {\n\t\treturn nil, err\n\t}\n\n\thostID, containerID, err := resolveContainerRef(args.ContainerID, args.Host, deps)\n\tif err != nil {\n\t\treturn nil, err\n\t}\n\n\tcs, err := deps.HostService.FindContainer(hostID, containerID, deps.Labels)\n\tif err != nil {\n\t\treturn nil, fmt.Errorf(\"container not found: %w\", err)\n\t}\n\n\tif err := cs.Action(ctx, action); err != nil {","sourceCodeStart":2,"sourceCodeEnd":38,"githubUrl":"https://github.com/amir20/dozzle/blob/d9463cbe21874e44ab79db6fa63e746ca7d22928/internal/cloud/tools_actions.go#L2-L38","documentation":"executeContainerAction parses its JSON arguments into containerActionArgs (container_id, host_id) with json.Unmarshal and wraps any parse failure as 'failed to parse arguments: %w'. The tool arguments string sent from cloud is not valid JSON or does not match the expected field types.","triggerScenarios":"The argsJSON passed by the cloud ToolRequest is empty, truncated, invalid JSON, or contains fields with wrong types (e.g. host_id as a number instead of string).","commonSituations":"LLM-generated tool arguments are malformed or wrapped in prose/markdown; schema drift between the advertised tool schema and the args struct; arguments double-encoded as JSON strings.","solutions":["Validate the JSON with a linter/parser to find the syntax error at the wrapped offset","Ensure argument field types match the struct: container_id and host_id must be JSON strings","Check that no extra encoding (quotes around the JSON, markdown fences) wraps argsJSON","Update the cloud tool schema so advertised parameters match containerActionArgs"],"exampleFix":"// before: args sent as a nested JSON string\n{\"args\": \"{\\\"container_id\\\": \\\"abc\\\"}\"}\n// after: plain JSON object\n{\"container_id\": \"abc\", \"host_id\": \"local\"}","handlingStrategy":"validation","validationCode":"// validate args JSON before dispatch\nvar probe map[string]json.RawMessage\nif err := json.Unmarshal([]byte(argsJSON), &probe); err != nil {\n    return fmt.Errorf(\"args not valid JSON: %w\", err)\n}\nfor _, k := range []string{\"container_id\", \"host_id\"} {\n    if _, ok := probe[k]; !ok { return fmt.Errorf(\"missing %s\", k) }\n}","typeGuard":null,"tryCatchPattern":"resp, err := executeContainerAction(ctx, name, argsJSON, deps)\nvar ue *json.UnmarshalTypeError\nif err != nil && errors.As(err, &ue) {\n    return toolErrorResponse(fmt.Sprintf(\"bad argument type for %s\", ue.Field))\n}","preventionTips":["Validate LLM-produced JSON before sending tool requests","Keep the advertised tool schema in sync with containerActionArgs","Strip markdown fences/whitespace from generated arguments","Include a JSON schema example in the tool description"],"tags":["json","tools","cloud","arguments","validation"],"backgroundTag":"json-unmarshal-failed","analyzedSha":"d9463cbe21874e44ab79db6fa63e746ca7d22928","analyzedAt":"2026-09-07T10:08:55.855Z","contentChangedAt":"2026-09-07T10:08:55.855Z","schemaVersion":2},"datasetVersion":"2026-09-16T04:17:20.429Z"}