{"record":{"id":"28607a54e9f751f6","repo":"sgl-project/sglang","slug":"kimi-k3-required-parameters-are-missing-schemas","errorCode":null,"errorMessage":"Kimi K3 required parameters are missing schemas: {sorted(missing)!r}","messagePattern":"Kimi K3 required parameters are missing schemas: (.+?)","errorType":"validation","errorClass":"ValueError","httpStatus":null,"severity":"error","filePath":"python/sglang/srt/function_call/kimik3_structural_tag.py","lineNumber":392,"sourceCode":"        content=content,\n        end=ARGUMENT_CLOSE,\n    )\n\n\ndef _strict_arguments_format(parameters: Dict[str, Any]) -> Format:\n    properties = parameters.get(\"properties\", {})\n    if not isinstance(properties, dict):\n        raise ValueError(\"Kimi K3 tool parameters 'properties' must be an object\")\n    required = parameters.get(\"required\", [])\n    if not isinstance(required, list) or not all(\n        isinstance(item, str) for item in required\n    ):\n        raise ValueError(\"Kimi K3 tool parameters 'required' must be a string list\")\n\n    required_set = set(required)\n    missing = required_set.difference(properties)\n    if missing:\n        raise ValueError(\n            f\"Kimi K3 required parameters are missing schemas: {sorted(missing)!r}\"\n        )\n\n    elements: List[Format] = []\n    for key, schema in properties.items():\n        if not isinstance(key, str) or not isinstance(schema, (bool, dict)):\n            raise ValueError(\"Kimi K3 tool property schemas must be JSON schemas\")\n        argument = _known_argument_format(key, schema, parameters)\n        if argument is None:\n            if key in required_set:\n                raise ValueError(\n                    f\"Kimi K3 required parameter {key!r} accepts no values\"\n                )\n            continue\n        elements.append(\n            argument if key in required_set else OptionalFormat(content=argument)\n        )\n","sourceCodeStart":374,"sourceCodeEnd":410,"githubUrl":"https://github.com/sgl-project/sglang/blob/0132848349585cfe6aae51c4941cbae872505f8a/python/sglang/srt/function_call/kimik3_structural_tag.py#L374-L410","documentation":"The names listed in tool.parameters.required must each have a corresponding schema in properties. If a required name has no property schema, the grammar cannot be built because a mandatory argument has no value format; the error lists the missing names sorted.","triggerScenarios":"\"required\": [\"city\"] while \"properties\" lacks a \"city\" key (typo, renamed field, or properties omitted).","commonSituations":"Renaming a field in properties but not in required; copying schemas between tools and leaving stale required entries; tool definitions assembled by string concatenation.","solutions":["Add a schema for each missing name in properties","Remove stale names from required if the parameter was deleted","Align names exactly (watch typos and case differences)"],"exampleFix":"// before\n\"properties\": {\"location\": {\"type\": \"string\"}}, \"required\": [\"city\"]\n// after\n\"properties\": {\"city\": {\"type\": \"string\"}}, \"required\": [\"city\"]","handlingStrategy":"validation","validationCode":"props = params.get(\"properties\", {})\nmissing = set(params.get(\"required\", [])).difference(props)\nassert not missing, f\"required without schemas: {sorted(missing)}\"","typeGuard":"def required_has_schemas(params: dict) -> bool:\n    return set(params.get(\"required\", [])).issubset(params.get(\"properties\", {}))","tryCatchPattern":"try:\n    build_tag(tools)\nexcept ValueError as e:\n    if \"missing schemas\" in str(e):\n        sync_required_with_properties(tools)\n    else:\n        raise","preventionTips":["Keep required and properties in sync on renames","Generate required from properties programmatically where possible"],"tags":["kimi-k3","json-schema","required-fields","validation"],"backgroundTag":"json-schema-validation-failed","analyzedSha":"0132848349585cfe6aae51c4941cbae872505f8a","analyzedAt":"2026-08-28T05:10:05.995Z","schemaVersion":2},"datasetVersion":"2026-08-28T06:17:29.519Z"}