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.

Source-backed Last updated May 14, 2026 2 sources Needs local verification

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: May 14, 2026
Verification status: Source-backed
Evidence: 2 public source URLs

Before you change production

This page includes public source URLs in the imported troubleshooting record. Compare those references with your version and environment before applying changes.

Reproduce the smallest failing action and save non-secret logs before changing configuration.
Check versions for Ollama, related SDKs, package managers, CI runners, and hosting providers.
Change one setting or dependency at a time, then rerun the same failing command or request.
Avoid destructive commands, credential rotation, billing changes, or security relaxations without a rollback plan.

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.

Diagnostic flow for this page

Match tool_call.function.arguments truncated or 502 Bad Gateway exactly before applying the quick fix.
Compare the failing environment with Ollama versions, account scope, provider settings, and deployment context.
Check the listed common causes in order, starting with the cause that best matches your logs.
Use the evidence status below to decide whether to confirm against public sources or official documentation.
Apply one reversible change, rerun the smallest failing action, and keep rollback notes.

FAQ

What does tool_call.function.arguments truncated or 502 Bad Gateway mean in Ollama?

tool_call.function.arguments truncated or 502 Bad Gateway indicates the workflow described by "Ollama Cloud Models: Tool Call Arguments Truncated or 502 on Large Outputs" failed in a Ollama context. Start by confirming the exact signature and the component that emitted it.

What should I check first for tool_call.function.arguments truncated or 502 Bad Gateway?

Check whether this cause matches your environment: 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.

Is the tool_call.function.arguments truncated or 502 Bad Gateway guidance source-backed?

The "Ollama Cloud Models: Tool Call Arguments Truncated or 502 on Large Outputs" page is labeled source-backed. It has 2 public source URLs from ollama.com, github.com, so use that evidence status when deciding how much additional verification you need.

When should I avoid the quick fix for tool_call.function.arguments truncated or 502 Bad Gateway?

For "Ollama Cloud Models: Tool Call Arguments Truncated or 502 on Large Outputs", avoid applying "Compare the failing environment with a known working setup, then change one configuration value at a time." when the error text differs, the affected version or provider is different, or the change would touch credentials, billing, DNS, production deploy settings, or irreversible data.

What should I collect before debugging tool_call.function.arguments truncated or 502 Bad Gateway?

For "Ollama Cloud Models: Tool Call Arguments Truncated or 502 on Large Outputs", collect the failing Ollama command or request, non-secret configuration, versions, timestamps, request IDs when available, and the smallest reproduction that still triggers the signature.