tool_calling_bugTier 1 · 70% confidence
ai-agents-tool-calling-bug-multi-step-agentic-tool-calling-fails-on-vertex-ai-aad1c779
agent: ai_agents
When does this happen?
IF Multi-step agentic tool calling fails on Vertex AI Gemini 3 models: returns 0 function calls, empty responses, or silent timeouts instead of errors.
How others solved it
THEN Upgrade to NeuroLink v9.49.0+ which fixes the issue by correctly replaying `thoughtSignature`, grouping parallel calls by `stepIndex`, and isolating sessions with a unique `executionId`. Enforce a 5-minute default timeout on the generate path and properly handle `TimeoutError` instead of empty responses.
import { NeuroLink } from '@juspay/neurolink';
const pipe = new NeuroLink();
// Use a unique executionId per invocation to prevent session overlap
const result = await pipe.generate({
input: '...',
provider: 'vertex-ai',
model: 'gemini-3-flash-preview',
executionId: crypto.randomUUID(),
timeout: 5 * 60 * 1000
});
try {
for await (const chunk of result.stream) { /* ... */ }
} catch (err) {
if (err instanceof TimeoutError) { /* handle timeout */ }
}Related patterns
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