Update agent-filtering-for-dogstatsd-custom-metrics.md with remote config + RBAC details (#32104)

* Update agent-filtering-for-dogstatsd-custom-metrics.md with remote config + RBAC details

* Apply suggestions from code review

Co-authored-by: domalessi <[email protected]>

* Update content/en/metrics/guide/agent-filtering-for-dogstatsd-custom-metrics.md

* Update content/en/metrics/guide/agent-filtering-for-dogstatsd-custom-metrics.md

---------

Co-authored-by: domalessi <[email protected]>

Author: 2 people

content/en/metrics/guide/agent-filtering-for-dogstatsd-custom-metrics.md

@@ -30,9 +30,23 @@ Agent-side filtering enables you to filter out unused or unwanted DogStatsD cust
 
 Filtering is performed at the Agent level but centrally managed through the Datadog UI, giving teams full visibility and control. You can create, update, and manage filtering policies in Datadog, streamlining metric governance while maintaining transparency.
 
+Creating and updating filtering policies requires the [`metric_tags_write`][1] RBAC permission. All users can view filtering policies.
+
+## Prerequisites
+
+- Upgrade to Datadog Agent v7.67.0 or higher (v7.70.0 or higher is recommended).
+- With [`org_management`][2] permissions, enable [Remote Configuration][3] for your organization.
+- With [`api_keys_write`][4] permissions, enable the [Remote Configuration capability on the API keys][5] used by your Agents. After enabling Remote Configuration on an API key, restart your Agents for the change to take effect.
+
+{{<img src="agent/remote_config/RC_Key_updated.png" alt="API Key properties with Remote Configuration capability Enable button." width="90%" style="center">}}
+
 ## Create a metric filtering policy
 
-You can create a metric filtering policy from the [Metrics Settings page][1] or the [Metrics Summary page][2].
+You can create a metric filtering policy from the [Metrics Settings page][6] or the [Metrics Summary page][7].
+
+Metric filtering policies are applied to all Agents v7.67.0+ with Remote Configuration enabled. Older Agent versions, or Agents with Remote Configuration disabled, do not apply filtering policies.
+
+Policy updates are deployed to Agents in 1-2 minutes.
 
 ### From the Metrics Settings page
 
@@ -184,5 +198,10 @@ This initial preview release includes the following limitations:
 
 {{< partial name="whats-next/whats-next.html" >}}
 
-[1]: https://app.datadoghq.com/metric/settings/policies
-[2]: https://app.datadoghq.com/metric/summary
+[1]: /account_management/rbac/permissions/#metrics
+[2]: /account_management/rbac/permissions/#access-management
+[3]: https://app.datadoghq.com/organization-settings/remote-config
+[4]: /account_management/rbac/permissions#api-and-application-keys
+[5]: https://app.datadoghq.com/organization-settings/api-keys
+[6]: https://app.datadoghq.com/metric/summary
+[7]: https://app.datadoghq.com/metric/settings/policies