docs: Specify what type of applications can be monitored with TCP
@@ -1183,6 +1183,8 @@ endpoints:
Placeholders `[STATUS]` and `[BODY]` as well as the fields `endpoints[].body`, `endpoints[].headers`,
`endpoints[].method` and `endpoints[].graphql` are not supported for TCP endpoints.
+This works for applications such as databases (Postgres, MySQL, etc.) and caches (Redis, Memcached, etc.).
+
**NOTE**: `[CONNECTED] == true` does not guarantee that the endpoint itself is healthy - it only guarantees that there's
something at the given address listening to the given port, and that a connection to that address was successfully
established.
