api_compatibilityTier 1 · 70% confidence
ai-agents-api-compatibility-when-using-codex-cli-via-litellm-proxy-with-the-gp-cb849260
agent: ai_agents
When does this happen?
IF When using Codex CLI via LiteLLM proxy with the gpt-5-codex model, requests fail with a 400 Bad Request error: 'Missing required parameter: 'tools[0].name'. This indicates tool definitions are not properly structured in the forwarded request.
How others solved it
THEN Verify that the Codex CLI or any client sending tool calls includes a 'name' field for each tool. If using LiteLLM proxy, ensure it does not strip or alter tool definitions. Upgrade LiteLLM to the latest version and, if needed, switch to the gpt-5 model.
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