VertexAI | Sample Single Agent App

[keith-decker]

A basic single agent app using Vertex AI, uses the same style as the Langchain single agent app.

Uses upstream instrumentation until SDOT instrumentation is implemented.

vertexai-single-agent (b696881688901a676b63470080ace992)
├──span id: fbe8d884b512fe20
├──parent span id:
├──trace state:
├──Status
│  ├──message:
│  └──code: Unset
├──flags: 256
├──name: chat gemini-2.5-flash-lite
├──kind: Client
├──duration: 1.43733s
├──start time: 2026-04-10 15:47:26.711245Z
├──end time: 2026-04-10 15:47:28.148575Z
├──dropped attributes count: 0
├──Attributes
│  ├──gen_ai.input.messages: [{"role":"user","parts":[{"content":"What is the weather in San Francisco?
│  ├──gen_ai.operation.name: chat
│  ├──gen_ai.output.messages: [{"role":"model","parts":[{"arguments":{"location":"San Francisco"},"name
│  ├──gen_ai.request.model: gemini-2.5-flash-lite
│  ├──gen_ai.response.finish_reasons:
│  ├──gen_ai.response.model: gemini-2.5-flash-lite
│  ├──gen_ai.system_instructions: [{"content":"You are a helpful weather assistant. Use the get_weather
│  ├──gen_ai.usage.input_tokens: 79
│  ├──gen_ai.usage.output_tokens: 6
│  ├──server.address: us-central1-aiplatform.googleapis.com
│  └──server.port: 443
├──Events
├──Links
└──Resource
   ├──dropped attributes count: 0
   ├──schema url: https://opentelemetry.io/schemas/1.6.1
   ├──Attributes
   │  ├──host.name: 6a8f9cc13094
   │  ├──os.type: linux
   │  ├──service.name: vertexai-single-agent
   │  ├──telemetry.sdk.language: python
   │  ├──telemetry.sdk.name: opentelemetry
   │  └──telemetry.sdk.version: 1.41.0
   └──Scopes
      └──opentelemetry.instrumentation.vertexai
         ├──schema url: https://opentelemetry.io/schemas/1.36.0
         ├──version:
         ├──dropped attributes count: 0
         └──Attributes