diff --git a/graphics/mapper/4.0/IMapper.hal b/graphics/mapper/4.0/IMapper.hal
index a541382..888b2af 100644
--- a/graphics/mapper/4.0/IMapper.hal
+++ b/graphics/mapper/4.0/IMapper.hal
@@ -515,5 +515,43 @@
                                 MetadataType metadataType)
             generates (Error error,
                        vec<uint8_t> metadata);
+
+    struct MetadataTypeDescription {
+        MetadataType metadataType;
+        /**
+         * description should contain a string representation of the MetadataType.
+         *
+         * For example: "MyExampleMetadataType is a 64-bit timestamp in nanoseconds
+         * that indicates when a buffer is decoded. It is set by the media HAL after
+         * a buffer is decoded. It is used by the display HAL for hardware
+         * synchronization".
+         *
+         * This field is required for any non-StandardMetadataTypes.
+         */
+        string description;
+        /**
+         * isGettable represents if the MetadataType can be get.
+         */
+        bool isGettable;
+        /**
+         * isSettable represents if the MetadataType can be set.
+         */
+        bool isSettable;
+    };
+
+    /**
+     * Lists all the MetadataTypes supported by IMapper as well as a description
+     * of each supported MetadataType. For StandardMetadataTypes, the description
+     * string can be left empty.
+     *
+     * @return error Error status of the call, which may be
+     *     - `NONE` upon success.
+     *     - `NO_RESOURCES` if the get cannot be fullfilled due to unavailability of
+     *       resources.
+     * @return descriptions Vector of MetadataTypeDescriptions that represent the
+     *  MetadataTypes supported by the device.
+     */
+    listSupportedMetadataTypes()
+            generates (Error error, vec<MetadataTypeDescription> descriptions);
 };
 
diff --git a/graphics/mapper/4.0/vts/functional/VtsHalGraphicsMapperV4_0TargetTest.cpp b/graphics/mapper/4.0/vts/functional/VtsHalGraphicsMapperV4_0TargetTest.cpp
index 1e8ec01..2a66cbf 100644
--- a/graphics/mapper/4.0/vts/functional/VtsHalGraphicsMapperV4_0TargetTest.cpp
+++ b/graphics/mapper/4.0/vts/functional/VtsHalGraphicsMapperV4_0TargetTest.cpp
@@ -41,6 +41,7 @@
 using aidl::android::hardware::graphics::common::ExtendableType;
 using aidl::android::hardware::graphics::common::PlaneLayout;
 using aidl::android::hardware::graphics::common::PlaneLayoutComponent;
+using aidl::android::hardware::graphics::common::StandardMetadataType;
 
 using DecodeFunction = std::function<void(const IMapper::BufferDescriptorInfo& descriptorInfo,
                                           const hidl_vec<uint8_t>& vec)>;
@@ -162,6 +163,27 @@
 
     std::unique_ptr<Gralloc> mGralloc;
     IMapper::BufferDescriptorInfo mDummyDescriptorInfo{};
+    static const std::set<StandardMetadataType> sRequiredMetadataTypes;
+};
+
+const std::set<StandardMetadataType> GraphicsMapperHidlTest::sRequiredMetadataTypes{
+        StandardMetadataType::BUFFER_ID,
+        StandardMetadataType::NAME,
+        StandardMetadataType::WIDTH,
+        StandardMetadataType::HEIGHT,
+        StandardMetadataType::LAYER_COUNT,
+        StandardMetadataType::PIXEL_FORMAT_REQUESTED,
+        StandardMetadataType::PIXEL_FORMAT_FOURCC,
+        StandardMetadataType::PIXEL_FORMAT_MODIFIER,
+        StandardMetadataType::USAGE,
+        StandardMetadataType::ALLOCATION_SIZE,
+        StandardMetadataType::PROTECTED_CONTENT,
+        StandardMetadataType::COMPRESSION,
+        StandardMetadataType::INTERLACED,
+        StandardMetadataType::CHROMA_SITING,
+        StandardMetadataType::PLANE_LAYOUTS,
+        StandardMetadataType::DATASPACE,
+        StandardMetadataType::BLEND_MODE,
 };
 
 /**
@@ -1591,6 +1613,54 @@
     ASSERT_EQ(0, vec.size());
 }
 
+/**
+ * Test IMapper::listSupportedMetadataTypes()
+ */
+TEST_F(GraphicsMapperHidlTest, ListSupportedMetadataTypes) {
+    hidl_vec<IMapper::MetadataTypeDescription> descriptions;
+    mGralloc->getMapper()->listSupportedMetadataTypes(
+            [&](const auto& tmpError, const auto& tmpDescriptions) {
+                ASSERT_EQ(Error::NONE, tmpError);
+                descriptions = tmpDescriptions;
+            });
+
+    std::set<StandardMetadataType> foundMetadataTypes;
+
+    std::set<StandardMetadataType> notSettableMetadataTypes{
+            StandardMetadataType::BUFFER_ID,   StandardMetadataType::NAME,
+            StandardMetadataType::WIDTH,       StandardMetadataType::HEIGHT,
+            StandardMetadataType::LAYER_COUNT, StandardMetadataType::PIXEL_FORMAT_REQUESTED,
+            StandardMetadataType::USAGE};
+
+    ASSERT_LE(sRequiredMetadataTypes.size(), descriptions.size());
+
+    for (const auto& description : descriptions) {
+        const auto& metadataType = description.metadataType;
+
+        if (!gralloc4::isStandardMetadataType(metadataType)) {
+            EXPECT_GT(0, description.description.size());
+            continue;
+        }
+
+        StandardMetadataType type = gralloc4::getStandardMetadataTypeValue(metadataType);
+
+        if (sRequiredMetadataTypes.find(type) == sRequiredMetadataTypes.end()) {
+            continue;
+        }
+
+        ASSERT_EQ(foundMetadataTypes.find(type), foundMetadataTypes.end());
+        foundMetadataTypes.insert(type);
+
+        ASSERT_TRUE(description.isGettable);
+
+        if (notSettableMetadataTypes.find(type) != notSettableMetadataTypes.end()) {
+            ASSERT_FALSE(description.isSettable);
+        }
+    }
+
+    ASSERT_EQ(sRequiredMetadataTypes, foundMetadataTypes);
+}
+
 }  // namespace
 }  // namespace vts
 }  // namespace V4_0