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fix: ensure input_schema is always present for Vertex AI proxy compatibility #233

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fix: ensure input_schema is always present for Vertex AI proxy compatibility #233

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9 changes: 8 additions & 1 deletion llm/ant/ant.go
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Original file line number Diff line number Diff line change
Expand Up @@ -608,11 +608,18 @@ func fromLLMToolChoice(tc *llm.ToolChoice) *toolChoice {
}

func fromLLMTool(t *llm.Tool) *tool {
schema := t.InputSchema
if schema == nil {
// Some proxies (e.g. Vertex AI via Langdock) strictly require input_schema
// to be present on every tool, even server-side tools where Anthropic's
// own API accepts omitting it. Default to an empty object schema.
schema = json.RawMessage(`{"type":"object","properties":{}}`)
}
return &tool{
Name: t.Name,
Type: t.Type,
Description: t.Description,
InputSchema: t.InputSchema,
InputSchema: schema,
CacheControl: fromLLMCache(t.Cache),
}
}
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