Ollama / Ollama
Ollama Cloud Models: Tool Call Arguments Truncated or 502 on Large Outputs
Fix Ollama cloud model tool_call function arguments truncated or 502 error Includes evidence for Ollama troubleshooting demand.
- Category
- Ollama
- Error signature
tool_call.function.arguments truncated or 502 Bad Gateway- Quick fix
- Compare the failing environment with a known working setup, then change one configuration value at a time.
- Updated
What this error means
tool_call.function.arguments truncated or 502 Bad Gateway is a Ollama failure pattern reported for developers trying to fix ollama cloud model tool_call function arguments truncated or 502 error. Based on the imported evidence, treat this as a tool-specific troubleshooting page rather than a generic API error.
Why this happens
Affects kimi-k2.6:cloud, glm-5.1:cloud, qwen3.5:397b. Both https://ollama.com/v1 and localhost:11434/v1 endpoints affected. Server-side issue on Ollama cloud infrastructure.
Common causes
- When using Ollama Cloud models with tool definitions, tool_call.function.arguments is truncated or returns 502 Bad Gateway on large outputs. Makes agent workflows that rely on tool calls unreliable or completely broken. Affects both cloud API and local proxy.
- Affects kimi-k2.6:cloud, glm-5.1:cloud, qwen3.5:397b. Both https://ollama.com/v1 and localhost:11434/v1 endpoints affected. Server-side issue on Ollama cloud infrastructure.
Quick fixes
- Confirm the exact error signature matches
tool_call.function.arguments truncated or 502 Bad Gateway. - Check the Ollama account, local tool state, and provider configuration involved in the failing workflow.
- Compare the failing environment with a known working setup, then change one configuration value at a time.
Platform/tool-specific checks
- Verify the command, editor, extension, or API client that produced the error.
- Compare local settings with CI, deployment, or editor-level settings when the error appears in only one environment.
- Avoid deleting credentials, local model data, or project settings until the failing scope is clear.
Step-by-step troubleshooting
- Capture the exact error message and the command, editor action, or request that triggered it.
- Check whether the failure is account/auth, quota/rate, model/provider, local runtime, or deployment configuration.
- Review the source evidence below and compare it with your environment.
- Apply one change at a time and rerun the smallest failing action.
- Keep the working fix documented for the team or deployment environment.
How to prevent it
- Keep provider/tool configuration documented.
- Record non-secret diagnostics such as tool version, provider name, model name, and command path.
- Add a lightweight check before CI or production workflows depend on the tool.
Sources checked
Evidence note: Affects kimi-k2.6:cloud, glm-5.1:cloud, qwen3.5:397b. Both https://ollama.com/v1 and localhost:11434/v1 endpoints affected. Server-side issue on Ollama cloud infrastructure.
Related errors
- Ollama cloud proxy unexpected EOF
- Ollama 500 Internal Server Error
FAQ
What should I check first?
Start with the exact tool_call.function.arguments truncated or 502 Bad Gateway text and the smallest action that reproduces it.
Can I ignore this error?
No. Treat it as a failed Ollama workflow until the root cause is understood.
Is this guaranteed to have one fix?
No. The imported evidence supports the troubleshooting path above, but tool behavior can vary by account, plan, version, provider, and local configuration.
How do I know the fix worked?
Rerun the same command, editor action, or request. The fix is working when that action completes without tool_call.function.arguments truncated or 502 Bad Gateway.