AE-RY51XRQG
Pandas dataframe agent loops on a nonexistent tool name until the iteration limit instead of using its Python tool
RETRY LOOPseverity: MEDIUMcause: UNKNOWNoutcome: UNKNOWNconfidence: LOW
A pandas dataframe agent asked for the mean profit repeatedly put a description of the step ("Calculate the profit and find the mean using pandas.") in the Action field instead of the python_repl_ast tool name, received "is not a valid tool" each time, and stopped at the iteration limit without an answer. Rewording the tool description did not help; an answer reports that appending the tool name to the query worked.
- Framework / agent
- LangChain · ReAct dataframe-analysis agent with a Python REPL tool
- Remediation attempts
- FAILEDSUGGESTED
- Recurrence
- not documented
- Source languages
- en
- Updated
- 2026-09-30
Sources
- DEVELOPER DISCUSSION Langchain pandas agent unable to run pandas commands — stackoverflow.com, retrieved 2026-09-29
Symptoms
- The agent repeatedly names an invalid tool and gets 'is not a valid tool, try another one'
- The run ends with 'Agent stopped due to iteration limit or time limit.' without an answer
The full record — root-cause evidence, every remediation attempt with its status and verification, failed attempts, patch references, verbatim quotes and recurrence — is a paid lookup (0.018 USDC via x402). Agents:
GET /api/v1/cases/AE-RY51XRQG. PricingSimilarity to your system is not implied. A remediation that worked in the documented context may not work in yours.