diff --git a/renderdoc/api/replay/data_types.h b/renderdoc/api/replay/data_types.h
index 32fe2b88b..40c2412a9 100644
--- a/renderdoc/api/replay/data_types.h
+++ b/renderdoc/api/replay/data_types.h
@@ -878,7 +878,7 @@ with software rendering, or with some functionality disabled due to lack of supp
 
 DECLARE_REFLECTION_STRUCT(APIProperties);
 
-DOCUMENT("A 128-bit Uuid.")
+DOCUMENT("A 128-bit Uuid.");
 struct Uuid
 {
   Uuid(uint32_t a, uint32_t b, uint32_t c, uint32_t d)
@@ -890,6 +890,14 @@ struct Uuid
   }
 
   Uuid() { bytes[0] = bytes[1] = bytes[2] = bytes[3] = 0; }
+  DOCUMENT("Compares two ``Uuid`` objects for less-than.");
+  bool operator<(const Uuid &rhs) const
+  {
+    return std::lexicographical_compare(bytes, bytes + 4, rhs.bytes, rhs.bytes + 4);
+  }
+
+  DOCUMENT("Compares two ``Uuid`` objects for equality.");
+  bool operator==(const Uuid &rhs) const { return ::memcmp(bytes, rhs.bytes, sizeof(bytes)) == 0; }
   DOCUMENT("The Uuid bytes.")
   uint32_t bytes[4];
 };
@@ -921,6 +929,9 @@ struct CounterDescription
 
   DOCUMENT("The :class:`CounterUnit` for the result value.");
   CounterUnit unit;
+
+  DOCUMENT("The :class:`Uuid` of this counter, which uniquely identifies it.");
+  Uuid uuid;
 };
 
 DECLARE_REFLECTION_STRUCT(CounterDescription);
diff --git a/renderdoc/core/replay_proxy.cpp b/renderdoc/core/replay_proxy.cpp
index 2a5b8ddb5..093b951aa 100644
--- a/renderdoc/core/replay_proxy.cpp
+++ b/renderdoc/core/replay_proxy.cpp
@@ -1602,8 +1602,9 @@ void Serialiser::Serialise(const char *name, CounterDescription &el)
   Serialise("", el.resultByteWidth);
   Serialise("", el.unit);
   Serialise("", el.category);
+  Serialise("", el.uuid);
 
-  SIZE_CHECK(72);
+  SIZE_CHECK(88);
 }
 
 template <>
diff --git a/renderdoc/driver/d3d11/d3d11_counters.cpp b/renderdoc/driver/d3d11/d3d11_counters.cpp
index 0ad9dc2b3..d4bfffebb 100644
--- a/renderdoc/driver/d3d11/d3d11_counters.cpp
+++ b/renderdoc/driver/d3d11/d3d11_counters.cpp
@@ -90,6 +90,12 @@ void D3D11DebugManager::DescribeCounter(GPUCounter counterID, CounterDescription
     }
   }
 
+  // 448A0516-B50E-4312-A6DC-CFE7222FC1AC
+  desc.uuid.bytes[0] = 0x448A0516;
+  desc.uuid.bytes[1] = 0xB50E4312;
+  desc.uuid.bytes[2] = 0xA6DCCFE7;
+  desc.uuid.bytes[3] = 0x222FC1AC ^ (uint32_t)counterID;
+
   desc.category = "D3D11";
 
   switch(counterID)
diff --git a/renderdoc/driver/d3d12/d3d12_counters.cpp b/renderdoc/driver/d3d12/d3d12_counters.cpp
index 76c29620d..5e5c58129 100644
--- a/renderdoc/driver/d3d12/d3d12_counters.cpp
+++ b/renderdoc/driver/d3d12/d3d12_counters.cpp
@@ -66,6 +66,11 @@ vector<GPUCounter> D3D12Replay::EnumerateCounters()
 void D3D12Replay::DescribeCounter(GPUCounter counterID, CounterDescription &desc)
 {
   desc.counterID = counterID;
+  // 0808CC9B-79DF-4549-81F7-85494E648F22
+  desc.uuid.bytes[0] = 0x0808CC9B;
+  desc.uuid.bytes[1] = 0x79DF4549;
+  desc.uuid.bytes[2] = 0x81F78549;
+  desc.uuid.bytes[3] = 0x4E648F22 ^ (uint32_t)counterID;
 
   switch(counterID)
   {
diff --git a/renderdoc/driver/gl/gl_counters.cpp b/renderdoc/driver/gl/gl_counters.cpp
index 8483e98f4..b3d171547 100644
--- a/renderdoc/driver/gl/gl_counters.cpp
+++ b/renderdoc/driver/gl/gl_counters.cpp
@@ -66,6 +66,11 @@ vector<GPUCounter> GLReplay::EnumerateCounters()
 void GLReplay::DescribeCounter(GPUCounter counterID, CounterDescription &desc)
 {
   desc.counterID = counterID;
+  // FFBA5548-FBF8-405D-BA18-F0329DA370A0
+  desc.uuid.bytes[0] = 0xFFBA5548;
+  desc.uuid.bytes[1] = 0xFBF8405D;
+  desc.uuid.bytes[2] = 0xBA18F032;
+  desc.uuid.bytes[3] = 0x9DA370A0 ^ (uint32_t)counterID;
 
   switch(counterID)
   {
diff --git a/renderdoc/driver/ihv/amd/amd_counters.cpp b/renderdoc/driver/ihv/amd/amd_counters.cpp
index 567d169a7..02ccdd474 100644
--- a/renderdoc/driver/ihv/amd/amd_counters.cpp
+++ b/renderdoc/driver/ihv/amd/amd_counters.cpp
@@ -28,6 +28,8 @@
 #include "official/GPUPerfAPI/Include/GPUPerfAPI.h"
 #include "official/GPUPerfAPI/Include/GPUPerfAPIFunctionTypes.h"
 
+#include "serialise/string_utils.h"
+
 typedef GPA_Status(__stdcall *PFN_GPA_INITIALIZE)();
 typedef GPA_Status(__stdcall *PFN_GPA_OPENCONTEXT)(void *pContext);
 typedef GPA_Status(__stdcall *PFN_GPA_GET_NUM_COUNTERS)(gpa_uint32 *pCount);
@@ -343,6 +345,12 @@ CounterDescription AMDCounters::InternalGetCounterDescription(uint32_t internalI
     default: desc.resultType = CompType::UInt; desc.resultByteWidth = sizeof(uint32_t);
   }
 
+  // C8958C90-B706-4F22-8AF5-E0A3831B2C39
+  desc.uuid.bytes[0] = 0xC8958C90;
+  desc.uuid.bytes[1] = 0xB7064F22;
+  desc.uuid.bytes[2] = 0x8AF5E0A3 ^ strhash(desc.name.c_str());
+  desc.uuid.bytes[3] = 0x831B2C39 ^ strhash(desc.description.c_str());
+
   return desc;
 }
 
diff --git a/renderdoc/driver/vulkan/vk_counters.cpp b/renderdoc/driver/vulkan/vk_counters.cpp
index ab3d3449e..70396fc8e 100644
--- a/renderdoc/driver/vulkan/vk_counters.cpp
+++ b/renderdoc/driver/vulkan/vk_counters.cpp
@@ -77,6 +77,11 @@ vector<GPUCounter> VulkanReplay::EnumerateCounters()
 void VulkanReplay::DescribeCounter(GPUCounter counterID, CounterDescription &desc)
 {
   desc.counterID = counterID;
+  // 6839CB5B-FBD2-4550-B606-8C65157C684C
+  desc.uuid.bytes[0] = 0x6839CB5B;
+  desc.uuid.bytes[1] = 0xFBD24550;
+  desc.uuid.bytes[2] = 0xB6068C65;
+  desc.uuid.bytes[3] = 0x157C684C ^ (uint32_t)counterID;
 
   switch(counterID)
   {