Pub/Sub Message Tool

The PubSubMessageTool allows your agents to publish messages to Google Cloud Pub/Sub topics, enabling them to trigger downstream asynchronous workflows or notify microservices.

Usage

Ensure your application has the roles/pubsub.publisher IAM role for the target topics.

using GoogleAdk.Core.Agents;
using GoogleAdk.Core.Tools;

var agent = new LlmAgent(new LlmAgentConfig
{
    Name = "automation_agent",
    Model = "gemini-2.5-flash",
    Instruction = "If a user asks to trigger a build, publish a message to the 'build-triggers' topic in project 'my-project'.",
    Tools = [ new PubSubMessageTool() ]
});

LLM Parameters

The agent will automatically provide: - projectId (string, required) - topicId (string, required) - message (string, required) - The payload of the message.

The tool returns the MessageId upon successful publication.