> For the complete documentation index, see [llms.txt](https://developer.harness.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://developer.harness.io/release-notes/waap-release-notes/2025/agent-release-notes-2025/istio-agent.md).

# Istio agent

## 2.2.0 — 16<sup>th</sup> July

Traceable’s Istio agent 2.2.0 provides the following updates:

### Updates

#### Add support for configuring `grpc_service` to be one of `envoy_grpc` / `google_grpc`

This update introduces configurability for the `grpc_service` parameter, allowing users to choose between `envoy_grpc` and `google_grpc` implementations tailored to their environment and preferences.

#### Add agent token support in metadata of filter to support multi-tenancy

The filter metadata now supports including agent tokens, enabling better multi-tenant isolation and secure identification of tenants within Istio deployments.