diff --git a/src/wp-includes/class-http.php b/src/wp-includes/class-http.php
index 1d0d5074e5..00fd2ad849 100644
--- a/src/wp-includes/class-http.php
+++ b/src/wp-includes/class-http.php
@@ -133,7 +133,7 @@ class WP_Http {
 	 *                                             compressed content is returned in the response anyway, it will
 	 *                                             need to be separately decompressed. Default true.
 	 *     @type bool         $sslverify           Whether to verify SSL for the request. Default true.
-	 *     @type string       sslcertificates      Absolute path to an SSL certificate .crt file.
+	 *     @type string       $sslcertificates     Absolute path to an SSL certificate .crt file.
 	 *                                             Default ABSPATH . WPINC . '/certificates/ca-bundle.crt'.
 	 *     @type bool         $stream              Whether to stream to a file. If set to true and no filename was
 	 *                                             given, it will be droped it in the WP temp dir and its name will
@@ -215,7 +215,7 @@ class WP_Http {
 		// Pre-parse for the HEAD checks.
 		$args = wp_parse_args( $args );
 
-		// By default, Head requests do not cause redirections.
+		// By default, HEAD requests do not cause redirections.
 		if ( isset( $args['method'] ) && 'HEAD' == $args['method'] ) {
 			$defaults['redirection'] = 0;
 		}
@@ -250,9 +250,9 @@ class WP_Http {
 		 *
 		 * @since 2.9.0
 		 *
-		 * @param false|array|WP_Error $preempt Whether to preempt an HTTP request's return value. Default false.
-		 * @param array                $parsed_args        HTTP request arguments.
-		 * @param string               $url      The request URL.
+		 * @param false|array|WP_Error $preempt     Whether to preempt an HTTP request's return value. Default false.
+		 * @param array                $parsed_args HTTP request arguments.
+		 * @param string               $url         The request URL.
 		 */
 		$pre = apply_filters( 'pre_http_request', false, $parsed_args, $url );
 
@@ -409,11 +409,11 @@ class WP_Http {
 		 *
 		 * @since 2.8.0
 		 *
-		 * @param array|WP_Error $response HTTP response or WP_Error object.
-		 * @param string         $context  Context under which the hook is fired.
-		 * @param string         $class    HTTP transport used.
-		 * @param array          $parsed_args        HTTP request arguments.
-		 * @param string         $url      The request URL.
+		 * @param array|WP_Error $response    HTTP response or WP_Error object.
+		 * @param string         $context     Context under which the hook is fired.
+		 * @param string         $class       HTTP transport used.
+		 * @param array          $parsed_args HTTP request arguments.
+		 * @param string         $url         The request URL.
 		 */
 		do_action( 'http_api_debug', $response, 'response', 'Requests', $parsed_args, $url );
 		if ( is_wp_error( $response ) ) {
@@ -438,9 +438,9 @@ class WP_Http {
 		 *
 		 * @since 2.9.0
 		 *
-		 * @param array  $response HTTP response.
-		 * @param array  $parsed_args        HTTP request arguments.
-		 * @param string $url      The request URL.
+		 * @param array  $response    HTTP response.
+		 * @param array  $parsed_args HTTP request arguments.
+		 * @param string $url         The request URL.
 		 */
 		return apply_filters( 'http_response', $response, $parsed_args, $url );
 	}
@@ -890,7 +890,7 @@ class WP_Http {
 		if ( ! empty( $wildcard_regex ) ) {
 			return ! preg_match( $wildcard_regex, $check['host'] );
 		} else {
-			return ! in_array( $check['host'], $accessible_hosts ); //Inverse logic, If it's in the array, then we can't access it.
+			return ! in_array( $check['host'], $accessible_hosts ); // Inverse logic, if it's in the array, then don't block it.
 		}
 
 	}
@@ -989,7 +989,7 @@ class WP_Http {
 	}
 
 	/**
-	 * Handles HTTP Redirects and follows them if appropriate.
+	 * Handles an HTTP redirect and follows it if appropriate.
 	 *
 	 * @since 3.7.0
 	 *
diff --git a/src/wp-includes/class-wp-http-requests-response.php b/src/wp-includes/class-wp-http-requests-response.php
index b6c5f24a96..2c836f6c15 100644
--- a/src/wp-includes/class-wp-http-requests-response.php
+++ b/src/wp-includes/class-wp-http-requests-response.php
@@ -60,8 +60,6 @@ class WP_HTTP_Requests_Response extends WP_HTTP_Response {
 	 *
 	 * @since 4.6.0
 	 *
-	 * @see \Requests_Utility_CaseInsensitiveDictionary
-	 *
 	 * @return \Requests_Utility_CaseInsensitiveDictionary Map of header name to header value.
 	 */
 	public function get_headers() {
diff --git a/src/wp-includes/http.php b/src/wp-includes/http.php
index 7b82b5e7ae..73eaefa603 100644
--- a/src/wp-includes/http.php
+++ b/src/wp-includes/http.php
@@ -154,7 +154,7 @@ function wp_remote_request( $url, $args = array() ) {
 }
 
 /**
- * Retrieve the raw response from the HTTP request using the GET method.
+ * Performs an HTTP request using the GET method and returns its response.
  *
  * @since 2.7.0
  *
@@ -171,7 +171,7 @@ function wp_remote_get( $url, $args = array() ) {
 }
 
 /**
- * Retrieve the raw response from the HTTP request using the POST method.
+ * Performs an HTTP request using the POST method and returns its response.
  *
  * @since 2.7.0
  *
@@ -188,7 +188,7 @@ function wp_remote_post( $url, $args = array() ) {
 }
 
 /**
- * Retrieve the raw response from the HTTP request using the HEAD method.
+ * Performs an HTTP request using the HEAD method and returns its response.
  *
  * @since 2.7.0
  *
@@ -417,7 +417,7 @@ function get_http_origin() {
  *
  * @since 3.4.0
  *
- * @return array Array of origin URLs.
+ * @return string[] Array of origin URLs.
  */
 function get_allowed_http_origins() {
 	$admin_origin = parse_url( admin_url() );
@@ -438,12 +438,13 @@ function get_allowed_http_origins() {
 	 *
 	 * @since 3.4.0
 	 *
-	 * @param array $allowed_origins {
-	 *     Default allowed HTTP origins.
-	 *     @type string Non-secure URL for admin origin.
-	 *     @type string Secure URL for admin origin.
-	 *     @type string Non-secure URL for home origin.
-	 *     @type string Secure URL for home origin.
+	 * @param string[] $allowed_origins {
+	 *     Array of default allowed HTTP origins.
+	 *
+	 *     @type string $0 Non-secure URL for admin origin.
+	 *     @type string $1 Secure URL for admin origin.
+	 *     @type string $2 Non-secure URL for home origin.
+	 *     @type string $3 Secure URL for home origin.
 	 * }
 	 */
 	return apply_filters( 'allowed_http_origins', $allowed_origins );
@@ -517,7 +518,7 @@ function send_origin_headers() {
  *
  * @since 3.5.2
  *
- * @param string $url
+ * @param string $url Request URL.
  * @return false|string URL or false on failure.
  */
 function wp_http_validate_url( $url ) {
@@ -572,9 +573,9 @@ function wp_http_validate_url( $url ) {
 				 *
 				 * @since 3.6.0
 				 *
-				 * @param bool   false Whether HTTP request is external or not.
-				 * @param string $host IP of the requested host.
-				 * @param string $url  URL of the requested host.
+				 * @param bool   $external Whether HTTP request is external or not.
+				 * @param string $host     Host name of the requested URL.
+				 * @param string $url      Requested URL.
 				 */
 				if ( ! apply_filters( 'http_request_host_is_external', false, $host, $url ) ) {
 					return false;
@@ -715,9 +716,9 @@ function wp_parse_url( $url, $component = -1 ) {
  * @link https://secure.php.net/manual/en/function.parse-url.php
  *
  * @param array|false $url_parts The parsed URL. Can be false if the URL failed to parse.
- * @param int    $component The specific component to retrieve. Use one of the PHP
- *                          predefined constants to specify which one.
- *                          Defaults to -1 (= return all parts as an array).
+ * @param int         $component The specific component to retrieve. Use one of the PHP
+ *                               predefined constants to specify which one.
+ *                               Defaults to -1 (= return all parts as an array).
  * @return mixed False on parse failure; Array of URL components on success;
  *               When a specific component has been requested: null if the component
  *               doesn't exist in the given URL; a string or - in the case of
@@ -747,7 +748,7 @@ function _get_component_from_parsed_url_array( $url_parts, $component = -1 ) {
  * @link https://secure.php.net/manual/en/url.constants.php
  *
  * @param int $constant PHP_URL_* constant.
- * @return string|bool The named key or false.
+ * @return string|false The named key or false.
  */
 function _wp_translate_php_url_constant_to_key( $constant ) {
 	$translation = array(
diff --git a/src/wp-includes/taxonomy.php b/src/wp-includes/taxonomy.php
index d93da9f138..4631a534dd 100644
--- a/src/wp-includes/taxonomy.php
+++ b/src/wp-includes/taxonomy.php
@@ -3305,21 +3305,21 @@ function clean_taxonomy_cache( $taxonomy ) {
 }
 
 /**
- * Retrieves the taxonomy relationship to the term object id.
+ * Retrieves the cached term objects for the given object ID.
  *
  * Upstream functions (like get_the_terms() and is_object_in_term()) are
  * responsible for populating the object-term relationship cache. The current
  * function only fetches relationship data that is already in the cache.
  *
  * @since 2.3.0
- * @since 4.7.0 Returns a `WP_Error` object if `get_term()` returns an error for
+ * @since 4.7.0 Returns a `WP_Error` object if there's an error with
  *              any of the matched terms.
  *
- * @param int    $id       Term object ID.
+ * @param int    $id       Term object ID, for example a post, comment, or user ID.
  * @param string $taxonomy Taxonomy name.
- * @return bool|array|WP_Error Array of `WP_Term` objects, if cached.
- *                             False if cache is empty for `$taxonomy` and `$id`.
- *                             WP_Error if get_term() returns an error object for any term.
+ * @return bool|WP_Term[]|WP_Error Array of `WP_Term` objects, if cached.
+ *                                 False if cache is empty for `$taxonomy` and `$id`.
+ *                                 WP_Error if get_term() returns an error object for any term.
  */
 function get_object_term_cache( $id, $taxonomy ) {
 	$_term_ids = wp_cache_get( $id, "{$taxonomy}_relationships" );