diff --git a/CHANGELOG.md b/CHANGELOG.md
index e5633cc4d..174e421d4 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -16,6 +16,12 @@ The format follows [Keep a Changelog](https://keepachangelog.com/en/1.1.0/).
 
 ### Added
 
+- **TDD: MCPToolAdapter.infer_resource_slots() TypeError with null properties** (#10470):
+  Added a TDD issue-capture Behave scenario that reproduces the bug where
+  `MCPToolAdapter.infer_resource_slots()` raises `TypeError` when the input schema
+  contains `{"properties": None}`. The test is tagged `@tdd_expected_fail` and will
+  pass (by inversion) until the underlying bug is fixed.
+
 - **Architecture Pool Supervisor Milestone Assignment** (#7521): Added a "PR Workflow
   for Major Changes" section to the `architecture-pool-supervisor` agent definition
   documenting the milestone assignment step for spec PRs. The agent now has
diff --git a/features/tdd_mcp_infer_resource_slots_null_properties.feature b/features/tdd_mcp_infer_resource_slots_null_properties.feature
index d339476ce..40d22bef4 100644
--- a/features/tdd_mcp_infer_resource_slots_null_properties.feature
+++ b/features/tdd_mcp_infer_resource_slots_null_properties.feature
@@ -4,7 +4,7 @@ Feature: TDD Issue #10470 — MCPToolAdapter.infer_resource_slots() raises TypeE
   the properties dict. When the key exists but has a null value ({"properties": None}),
   dict.get() returns None instead of the default {}, causing a TypeError when iterating.
 
-  @tdd_issue @tdd_issue_10470 @tdd_expected_fail
+  @tdd_expected_fail
   Scenario: infer_resource_slots() with null properties does not raise TypeError
     Given an MCP tool input schema where properties key is null
     When I call infer_resource_slots with the null properties schema