diff --git a/xml/Microsoft.Extensions.Http.Logging/LoggingHttpMessageHandler.xml b/xml/Microsoft.Extensions.Http.Logging/LoggingHttpMessageHandler.xml
index ac4ab1b878a..f296cebea7a 100644
--- a/xml/Microsoft.Extensions.Http.Logging/LoggingHttpMessageHandler.xml
+++ b/xml/Microsoft.Extensions.Http.Logging/LoggingHttpMessageHandler.xml
@@ -19,7 +19,7 @@
   </Base>
   <Interfaces />
   <Docs>
-    <summary>To be added.</summary>
+    <summary>Handles logging of the lifecycle for an HTTP request.</summary>
     <remarks>To be added.</remarks>
   </Docs>
   <Members>
@@ -44,9 +44,11 @@
         <Parameter Name="logger" Type="Microsoft.Extensions.Logging.ILogger" />
       </Parameters>
       <Docs>
-        <param name="logger">To be added.</param>
-        <summary>To be added.</summary>
+        <param name="logger">The <see cref="T:Microsoft.Extensions.Logging.ILogger" /> to log to.</param>
+        <summary>Initializes a new instance of the <see cref="T:Microsoft.Extensions.Http.Logging.LoggingHttpMessageHandler" /> class with a specified logger.</summary>
         <remarks>To be added.</remarks>
+        <exception cref="T:System.ArgumentNullException">
+          <paramref name="logger" /> is <see langword="null" />.</exception>
       </Docs>
     </Member>
     <Member MemberName=".ctor">
@@ -67,10 +69,12 @@
         <Parameter Name="options" Type="Microsoft.Extensions.Http.HttpClientFactoryOptions" Index="1" FrameworkAlternate="dotnet-plat-ext-5.0;dotnet-plat-ext-6.0" />
       </Parameters>
       <Docs>
-        <param name="logger">To be added.</param>
-        <param name="options">To be added.</param>
-        <summary>To be added.</summary>
+        <param name="logger">The <see cref="T:Microsoft.Extensions.Logging.ILogger" /> to log to.</param>
+        <param name="options">The <see cref="T:Microsoft.Extensions.Http.HttpClientFactoryOptions" /> used to configure the <see cref="T:Microsoft.Extensions.Http.Logging.LoggingHttpMessageHandler" /> instance.</param>
+        <summary>Initializes a new instance of the <see cref="T:Microsoft.Extensions.Http.Logging.LoggingHttpMessageHandler" /> class with a specified logger and options.</summary>
         <remarks>To be added.</remarks>
+        <exception cref="T:System.ArgumentNullException">
+          <paramref name="logger" /> or <paramref name="options" /> is <see langword="null" />.</exception>
       </Docs>
     </Member>
     <Member MemberName="SendAsync">
@@ -108,7 +112,16 @@
         <param name="cancellationToken">To be added.</param>
         <summary>To be added.</summary>
         <returns>To be added.</returns>
-        <remarks>To be added.</remarks>
+        <remarks>
+          <format type="text/markdown"><![CDATA[
+
+## Remarks
+
+Logs the request and response from the sent <xref:System.Net.Http.HttpRequestMessage>.
+
+          ]]></format>
+        </remarks>
+        <inheritdoc />
       </Docs>
     </Member>
   </Members>
diff --git a/xml/Microsoft.Extensions.Http.Logging/LoggingScopeHttpMessageHandler.xml b/xml/Microsoft.Extensions.Http.Logging/LoggingScopeHttpMessageHandler.xml
index 1fc1e3c714a..807df72583a 100644
--- a/xml/Microsoft.Extensions.Http.Logging/LoggingScopeHttpMessageHandler.xml
+++ b/xml/Microsoft.Extensions.Http.Logging/LoggingScopeHttpMessageHandler.xml
@@ -19,7 +19,7 @@
   </Base>
   <Interfaces />
   <Docs>
-    <summary>To be added.</summary>
+    <summary>Handles logging of the lifecycle for an HTTP request within a log scope.</summary>
     <remarks>To be added.</remarks>
   </Docs>
   <Members>
@@ -44,9 +44,11 @@
         <Parameter Name="logger" Type="Microsoft.Extensions.Logging.ILogger" />
       </Parameters>
       <Docs>
-        <param name="logger">To be added.</param>
-        <summary>To be added.</summary>
+        <param name="logger">The <see cref="T:Microsoft.Extensions.Logging.ILogger" /> to log to.</param>
+        <summary>Initializes a new instance of the <see cref="T:Microsoft.Extensions.Http.Logging.LoggingScopeHttpMessageHandler" /> class with a specified logger.</summary>
         <remarks>To be added.</remarks>
+        <exception cref="T:System.ArgumentNullException">
+          <paramref name="logger" /> is <see langword="null" />.</exception>
       </Docs>
     </Member>
     <Member MemberName=".ctor">
@@ -67,10 +69,12 @@
         <Parameter Name="options" Type="Microsoft.Extensions.Http.HttpClientFactoryOptions" Index="1" FrameworkAlternate="dotnet-plat-ext-5.0;dotnet-plat-ext-6.0" />
       </Parameters>
       <Docs>
-        <param name="logger">To be added.</param>
-        <param name="options">To be added.</param>
-        <summary>To be added.</summary>
+        <param name="logger">The <see cref="T:Microsoft.Extensions.Logging.ILogger" /> to log to.</param>
+        <param name="options">The <see cref="T:Microsoft.Extensions.Http.HttpClientFactoryOptions" /> used to configure the <see cref="T:Microsoft.Extensions.Http.Logging.LoggingScopeHttpMessageHandler" /> instance.</param>
+        <summary>Initializes a new instance of the <see cref="T:Microsoft.Extensions.Http.Logging.LoggingScopeHttpMessageHandler" /> class with a specified logger and options.</summary>
         <remarks>To be added.</remarks>
+        <exception cref="T:System.ArgumentNullException">
+          <paramref name="logger" /> or <paramref name="options" /> is <see langword="null" />.</exception>
       </Docs>
     </Member>
     <Member MemberName="SendAsync">
@@ -108,7 +112,16 @@
         <param name="cancellationToken">To be added.</param>
         <summary>To be added.</summary>
         <returns>To be added.</returns>
-        <remarks>To be added.</remarks>
+        <remarks>
+          <format type="text/markdown"><![CDATA[
+
+## Remarks
+
+Logs the request and response from the sent <xref:System.Net.Http.HttpRequestMessage>.
+
+          ]]></format>
+        </remarks>
+        <inheritdoc />
       </Docs>
     </Member>
   </Members>
diff --git a/xml/Microsoft.Extensions.Http/HttpMessageHandlerBuilder.xml b/xml/Microsoft.Extensions.Http/HttpMessageHandlerBuilder.xml
index a6678a57eb1..db002c1235c 100644
--- a/xml/Microsoft.Extensions.Http/HttpMessageHandlerBuilder.xml
+++ b/xml/Microsoft.Extensions.Http/HttpMessageHandlerBuilder.xml
@@ -129,11 +129,20 @@
         <Parameter Name="additionalHandlers" Type="System.Collections.Generic.IEnumerable&lt;System.Net.Http.DelegatingHandler&gt;" />
       </Parameters>
       <Docs>
-        <param name="primaryHandler">To be added.</param>
-        <param name="additionalHandlers">To be added.</param>
-        <summary>To be added.</summary>
-        <returns>To be added.</returns>
+        <param name="primaryHandler">An instance of <see cref="T:System.Net.Http.HttpMessageHandler" /> to operate at the bottom of the handler chain and actually handle the HTTP transport operations.</param>
+        <param name="additionalHandlers">An ordered list of <see cref="T:System.Net.Http.DelegatingHandler" /> instances to be invoked as part of sending an <see cref="T:System.Net.Http.HttpRequestMessage" /> and receiving an <see cref="T:System.Net.Http.HttpResponseMessage" />.
+            The handlers are invoked in a top-down fashion. That is, the first entry is invoked first for an outbound request message but last for an inbound response message.</param>
+        <summary>Constructs an instance of <see cref="T:System.Net.Http.HttpMessageHandler" /> by chaining <paramref name="additionalHandlers" /> one after another with <paramref name="primaryHandler" /> in the end of the chain. The resulting pipeline is used by <see cref="T:System.Net.Http.IHttpClientFactory" /> infrastructure to create <see cref="T:System.Net.Http.HttpClient" /> instances with customized message handlers. The resulting pipeline can also be accessed by using <see cref="T:System.Net.Http.IHttpMessageHandlerFactory" /> instead of <see cref="T:System.Net.Http.IHttpClientFactory" />.</summary>
+        <returns>The HTTP message handler chain.</returns>
         <remarks>To be added.</remarks>
+        <exception cref="T:System.ArgumentNullException">
+          <paramref name="primaryHandler " /> or <paramref name="additionalHandlers " /> is <see langword="null" />.</exception>
+        <exception cref="T:System.InvalidOperationException">
+          <paramref name="additionalHandlers " /> contains a <see langword="null" /> entry.
+
+-or-
+
+<c>DelegatingHandler.InnerHandler</c> is not <see langword="null" />. <c>DelegatingHandler</c> instances provided to <c>HttpMessageHandlerBuilder</c> must not be reused or cached.</exception>
       </Docs>
     </Member>
     <Member MemberName="Name">
diff --git a/xml/Microsoft.Extensions.Http/IHttpMessageHandlerBuilderFilter.xml b/xml/Microsoft.Extensions.Http/IHttpMessageHandlerBuilderFilter.xml
index 1c3613c2a03..91af4c3c82e 100644
--- a/xml/Microsoft.Extensions.Http/IHttpMessageHandlerBuilderFilter.xml
+++ b/xml/Microsoft.Extensions.Http/IHttpMessageHandlerBuilderFilter.xml
@@ -47,7 +47,7 @@
       <Docs>
         <param name="next">A delegate which will run the next <see cref="T:Microsoft.Extensions.Http.IHttpMessageHandlerBuilderFilter" />.</param>
         <summary>Applies additional initialization to the <see cref="T:Microsoft.Extensions.Http.HttpMessageHandlerBuilder" />.</summary>
-        <returns>To be added.</returns>
+        <returns>The configured <see cref="T:Microsoft.Extensions.Http.HttpMessageHandlerBuilder" />.</returns>
         <remarks>To be added.</remarks>
       </Docs>
     </Member>