google-agents-cli-publish

Gemini Enterprise Registration

Requires: A deployed agent. For Agent Runtime, deployment_metadata.json (created by agents-cli deploy) enables auto-detection. For Cloud Run or GKE, provide the agent card URL and flags directly.

Prerequisites

1. Agent must be deployed — the agent must be running and reachable
2. Gemini Enterprise app must exist — Create one in Google Cloud Console → Gemini Enterprise → Apps before registering
3. deployment_metadata.json (Agent Runtime only) — Created automatically by agents-cli deploy; contains the agent runtime ID, deployment target, and A2A flag

Required Permissions for A2A on Cloud Run

• roles/run.servicesInvoker granted to the Discovery Engine service account (service-<PROJECT_NUMBER>@gcp-sa-discoveryengine.iam.gserviceaccount.com) on the Cloud Run service.

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Registration Modes

ADK Registration (default)

For standard ADK agents deployed to Agent Runtime. The agent is registered directly via its reasoning engine resource name.

agents-cli publish gemini-enterprise \
  --agent-runtime-id projects/123456/locations/us-east1/reasoningEngines/789 \
  --gemini-enterprise-app-id projects/123456/locations/global/collections/default_collection/engines/my-app \
  --display-name "My Agent" \
  --description "Handles customer queries" \
  --tool-description "Answers questions about products"

A2A Registration

For agents using the Agent-to-Agent protocol. Requires an agent card URL — the command fetches the card and registers it.

# A2A on Cloud Run
agents-cli publish gemini-enterprise \
  --registration-type a2a \
  --agent-card-url https://my-service-abc123.us-east1.run.app/a2a/app/.well-known/agent-card.json \
  --gemini-enterprise-app-id projects/123456/locations/global/collections/default_collection/engines/my-app \
  --display-name "My A2A Agent"

# A2A on Agent Runtime (card URL is auto-constructed from metadata)
agents-cli publish gemini-enterprise \
  --registration-type a2a \
  --gemini-enterprise-app-id projects/123456/locations/global/collections/default_collection/engines/my-app

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Programmatic Mode (CI/CD)

The command is non-interactive by default — pass all required values via flags or environment variables. This makes it safe for CI/CD pipelines.

Via flags

agents-cli publish gemini-enterprise \
  --agent-runtime-id "$AGENT_RUNTIME_ID" \
  --gemini-enterprise-app-id "$GEMINI_ENTERPRISE_APP_ID" \
  --display-name "Production Agent" \
  --registration-type adk

Via environment variables

Most flags have an env var alternative (--metadata-file, --interactive, and --list do not):

export AGENT_RUNTIME_ID="projects/123456/locations/us-east1/reasoningEngines/789"
export GEMINI_ENTERPRISE_APP_ID="projects/123456/locations/global/collections/default_collection/engines/my-app"
export GEMINI_DISPLAY_NAME="Production Agent"
export GEMINI_DESCRIPTION="Handles customer queries"

agents-cli publish gemini-enterprise

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Interactive Mode (--interactive)

Pass --interactive (or -i) to be guided through any missing values with interactive prompts. The command will list available Gemini Enterprise apps, offer to auto-detect the agent runtime ID from metadata, and prompt for display name and description.

agents-cli publish gemini-enterprise --interactive

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Complete Flag Reference

Flag	Env Var	Description
--agent-runtime-id	AGENT_RUNTIME_ID	Agent Runtime resource name (auto-detected from deployment_metadata.json)
--gemini-enterprise-app-id	ID or GEMINI_ENTERPRISE_APP_ID	Gemini Enterprise app full resource name
--display-name	GEMINI_DISPLAY_NAME	Display name in Gemini Enterprise
--description	GEMINI_DESCRIPTION	Agent description
--tool-description	GEMINI_TOOL_DESCRIPTION	Tool description (ADK mode only, defaults to description)
--registration-type	REGISTRATION_TYPE	adk or a2a (auto-detected from metadata if not set)
--agent-card-url	AGENT_CARD_URL	Agent card URL for A2A registration
--deployment-target	DEPLOYMENT_TARGET	agent_runtime, cloud_run, or gke (affects A2A auth method)
--project-id	GOOGLE_CLOUD_PROJECT	GCP project ID for billing
--project-number	PROJECT_NUMBER	GCP project number (used for Gemini Enterprise lookup)
--authorization-id	GEMINI_AUTHORIZATION_ID	OAuth authorization resource name
--metadata-file	—	Path to deployment metadata (default: deployment_metadata.json)
--interactive / -i	—	Enable interactive prompts
--list	—	List Gemini Enterprise apps in the current project and exit

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Auto-Detection from Metadata

When deployment_metadata.json exists, the command automatically:

• Reads the agent runtime ID (remote_agent_runtime_id)
• Detects the registration type (is_a2a flag)
• Constructs the agent card URL for A2A agents on Agent Runtime
• Determines the deployment target for authentication

This means that for the simplest case (ADK agent on Agent Runtime), you only need to provide the Gemini Enterprise app ID:

agents-cli publish gemini-enterprise \
  --gemini-enterprise-app-id projects/123456/locations/global/collections/default_collection/engines/my-app

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SDK Compatibility

Agent Runtime deployments may encounter "Session not found" errors with google-cloud-aiplatform versions <= 1.128.0. In interactive mode (--interactive), the command checks the SDK version from uv.lock and offers to upgrade. In programmatic mode, ensure your SDK is up to date before registering.

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Managing Agents in Agent Registry

Agent Registry (Preview) is the Google Cloud fleet-wide record of your agents. Agents deployed to a managed runtime (Agent Runtime on Gemini Enterprise Agent Platform) are auto-registered — no extra step after agents-cli deploy. Manage them with gcloud (requires roles/agentregistry.editor):

# List / filter
gcloud alpha agent-registry agents list --project PROJECT --location LOCATION
gcloud alpha agent-registry agents list --filter="displayName:my-agent"

# Inspect
gcloud alpha agent-registry agents describe AGENT_NAME

# Update endpoint/metadata — edit the Service resource, not the Agent
gcloud alpha agent-registry services update AGENT_NAME \
  --display-name "..." --description "..." \
  --interfaces "url=ENDPOINT_URL,protocol=HTTP_JSON"

# Remove: delete the underlying runtime agent (auto-registered) OR, for
# manually registered agents, delete the Service resource
gcloud alpha agent-registry services delete AGENT_NAME

Docs: https://docs.cloud.google.com/agent-registry/manage-agents

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Troubleshooting

Issue	Solution
"Session not found" after registration	SDK version issue — upgrade google-cloud-aiplatform (see SDK Compatibility above), redeploy, then re-register
--registration-type is required	Non-interactive mode needs --registration-type when no deployment_metadata.json exists
"Gemini Enterprise App ID is required"	Provide --gemini-enterprise-app-id or set the ID / GEMINI_ENTERPRISE_APP_ID env var
Re-publishing the same agent	Registration is idempotent — re-running updates the existing registration in place instead of creating a duplicate
HTTP 403 on registration	Check that your account has Discovery Engine Editor permissions on the Gemini Enterprise project
"Could not fetch agent card"	Verify the agent is running and the URL is correct; for Cloud Run, ensure gcloud auth login is done

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Related Skills

• /google-agents-cli-deploy — Deployment targets, CI/CD pipelines, and production workflows
• /google-agents-cli-workflow — Development workflow, coding guidelines, and operational rules
• /google-agents-cli-scaffold — Project creation and enhancement with agents-cli scaffold create / scaffold enhance