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[openai] Remove incorrect tool call id from tool call delta#2210
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Merged
DouweM merged 3 commits intopydantic:mainfromnaveen-corpusant:nav/fix-openai-streamed-tool-call-idsJul 16, 2025
Merged
[openai] Remove incorrect tool call id from tool call delta#2210
DouweM merged 3 commits intopydantic:mainfromnaveen-corpusant:nav/fix-openai-streamed-tool-call-idsJul 16, 2025
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ibash-corpusant approved these changesJul 15, 2025
Do you have a snippet I can reproduce so we can add a test here? |
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@naveen-corpusant Thank you! |
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For OpenAI responses API, the
response.function_call_arguments.delta
returns anitem_id
(docs) . This item_id is actually theid
of the tool_call, rather than thetool_call_id
.The problem is that when using agent_stream or more generally the parts_manager, these deltas are accumulated and the
tool_call_id
for the ToolCallNode ends up being set to the incorrectid
. This is particularly problematic because theid
is a longer string than is supported by some gpt models (for example, an id isfc_6876aca7db8c8192af95414c6cf92796035a7a219e794395
, whereas the tool call id for the same request iscall_YHzL9zYTlauY9bw9dEoE4uA4
.gpt-4o-mini
only allows tool call ids that are 40 characters or less, so using the longer id breaks things (and is incorrect from a tool call id perspective).