{"record":{"id":"7a6684f630ef38ad","repo":"run-llama/llama_index","slug":"cannot-call-query-engine-without-specifying-input","errorCode":null,"errorMessage":"Cannot call query engine without specifying `input` parameter.","messagePattern":"Cannot call query engine without specifying `input` parameter\\.","errorType":"validation","errorClass":"ValueError","httpStatus":null,"severity":"error","filePath":"llama-index-core/llama_index/core/tools/query_engine.py","lineNumber":110,"sourceCode":"        )\n\n        tool_config = IndexToolConfig(\n            query_engine=self.query_engine,\n            name=self.metadata.get_name(),\n            description=self.metadata.description,\n        )\n        return LlamaIndexTool.from_tool_config(tool_config=tool_config)\n\n    def _get_query_str(self, *args: Any, **kwargs: Any) -> str:\n        if args is not None and len(args) > 0:\n            query_str = str(args[0])\n        elif kwargs is not None and \"input\" in kwargs:\n            # NOTE: this assumes our default function schema of `input`\n            query_str = kwargs[\"input\"]\n        elif kwargs is not None and self._resolve_input_errors:\n            query_str = str(kwargs)\n        else:\n            raise ValueError(\n                \"Cannot call query engine without specifying `input` parameter.\"\n            )\n        return query_str\n","sourceCodeStart":92,"sourceCodeEnd":114,"githubUrl":"https://github.com/run-llama/llama_index/blob/afd0fef371831f9bda13e5af7167cf4e981278ab/llama-index-core/llama_index/core/tools/query_engine.py#L92-L114","documentation":"Error \"Cannot call query engine without specifying `input` parameter.\" thrown in run-llama/llama_index.","triggerScenarios":"Thrown at llama-index-core/llama_index/core/tools/query_engine.py:110 when the library encounters an invalid state.","commonSituations":"See trigger scenarios.","solutions":["Pass an input parameter when calling the query engine tool.","Check the tool metadata so the agent knows to supply 'input'."],"exampleFix":null,"handlingStrategy":null,"validationCode":null,"typeGuard":null,"tryCatchPattern":null,"preventionTips":[],"tags":[],"backgroundTag":null,"analyzedSha":"afd0fef371831f9bda13e5af7167cf4e981278ab","analyzedAt":"2026-08-15T05:42:58.429Z","schemaVersion":2},"datasetVersion":"2026-08-15T17:31:12.345Z"}