diff --git a/CHANGELOG.md b/CHANGELOG.md
index 1ff9622..0ed9249 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -12,7 +12,7 @@ All notable changes to DevBrain are tracked in this file. Versions follow [Seman
 - Added reason-specific server-side diagnostics for OAuth refresh failures. `TokenHandler/refresh` now logs a stable rejection reason (`missing`, `expired`, `replay_window_expired`, `wrong_client`, `upstream_missing_or_expired`, etc.) plus short SHA-256 refresh-token fingerprints so stale per-session client credential generations can be correlated without logging token material.
 - Updated the compatibility notes for the modern unified ChatGPT/Codex Windows app, which is currently working well with DevBrain OAuth but remains under monitoring rather than being marked fully resolved.
 - Added optional OAuth token-window settings for deployments that need a different refresh cadence or replay tolerance: `OAUTH_ACCESS_TOKEN_LIFETIME_MINUTES` and `OAUTH_REFRESH_REPLAY_LIFETIME_MINUTES` flow through Bicep to `OAuth__AccessTokenLifetimeMinutes` and `OAuth__RefreshReplayLifetimeMinutes`. Values must be whole minutes from 1 through 1,440. If left unset, DevBrain uses its built-in defaults: 10 minutes for access tokens and 5 minutes for refresh replay markers.
-- Refreshed the deployed runtime dependency stack to current compatible NuGet releases, including `Microsoft.Azure.Functions.Worker` 2.52.0, `Microsoft.Azure.Functions.Worker.Extensions.Mcp` 1.5.0, `ModelContextProtocol` 1.3.0, `Microsoft.ApplicationInsights.WorkerService` 2.23.0, `Microsoft.Azure.Cosmos` 3.60.0, `Microsoft.Extensions.Azure` 1.14.0, IdentityModel 8.18.0, `Microsoft.AspNetCore.DataProtection` 10.0.8, and `System.Security.Cryptography.Xml` 10.0.10.
+- Refreshed the deployed runtime dependency stack to current compatible NuGet releases, including `Microsoft.Azure.Functions.Worker` 2.52.0, `Microsoft.Azure.Functions.Worker.Extensions.Mcp` 1.6.0, `Microsoft.ApplicationInsights.WorkerService` 2.23.0, `Microsoft.Azure.Cosmos` 3.60.0, `Microsoft.Extensions.Azure` 1.14.0, IdentityModel 8.18.0, `Microsoft.AspNetCore.DataProtection` 10.0.8, and `System.Security.Cryptography.Xml` 10.0.10. Removed the unused direct `ModelContextProtocol` package reference.
 - Kept Application Insights on the direct Azure Functions isolated worker integration path (`AddApplicationInsightsTelemetryWorkerService` + `ConfigureFunctionsApplicationInsights`) instead of moving to the newer OpenTelemetry telemetry wiring.
 - Refreshed test tooling to `Microsoft.NET.Test.Sdk` 18.6.0, `xunit.runner.visualstudio` 3.1.5, and `Microsoft.Extensions.TimeProvider.Testing` 10.6.0.
 - Synced the release notes with merged Dependabot PR #19, which already moved `Microsoft.AspNetCore.DataProtection` and `System.Security.Cryptography.Xml` to 10.0.7.
diff --git a/docs/devbrain-spec-v1.md b/docs/devbrain-spec-v1.md
index 1990fef..e1bc01e 100644
--- a/docs/devbrain-spec-v1.md
+++ b/docs/devbrain-spec-v1.md
@@ -89,7 +89,7 @@ Partition key path: `/key`. The `id` and `key` fields are always identical — t
 
 ## MCP Tools
 
-All four tools are implemented in `DocumentTools.cs` using `[McpServerTool]` attributes from the `ModelContextProtocol` C# SDK. The Azure Functions MCP extension (`Microsoft.Azure.Functions.Worker.Extensions.Mcp`) wires them into the Functions runtime via `[McpToolTrigger]`.
+All four tools are implemented in `DocumentTools.cs` using `[McpToolTrigger]` attributes from `Microsoft.Azure.Functions.Worker.Extensions.Mcp`.
 
 ### `UpsertDocument`
 
@@ -148,7 +148,6 @@ Authentication is handled by Azure Functions' built-in Easy Auth (App Service Au
 <PackageReference Include="Microsoft.Azure.Functions.Worker" />
 <PackageReference Include="Microsoft.Azure.Functions.Worker.Extensions.Mcp" />
 <PackageReference Include="Microsoft.Azure.Functions.Worker.Extensions.Http" />
-<PackageReference Include="ModelContextProtocol" />
 <PackageReference Include="Microsoft.Azure.Cosmos" />
 <PackageReference Include="Azure.Identity" />
 <PackageReference Include="Microsoft.Extensions.Azure" />
diff --git a/src/DevBrain.Functions/DevBrain.Functions.csproj b/src/DevBrain.Functions/DevBrain.Functions.csproj
index 9b711f8..bdbd7e5 100644
--- a/src/DevBrain.Functions/DevBrain.Functions.csproj
+++ b/src/DevBrain.Functions/DevBrain.Functions.csproj
@@ -10,11 +10,10 @@
   <ItemGroup>
     <PackageReference Include="Microsoft.Azure.Functions.Worker" Version="2.52.0" />
     <PackageReference Include="Microsoft.Azure.Functions.Worker.Sdk" Version="2.0.7" />
-    <PackageReference Include="Microsoft.Azure.Functions.Worker.Extensions.Mcp" Version="1.5.0" />
+    <PackageReference Include="Microsoft.Azure.Functions.Worker.Extensions.Mcp" Version="1.6.0" />
     <PackageReference Include="Microsoft.Azure.Functions.Worker.Extensions.Http" Version="3.3.0" />
     <PackageReference Include="Microsoft.Azure.Functions.Worker.ApplicationInsights" Version="2.50.0" />
     <PackageReference Include="Microsoft.ApplicationInsights.WorkerService" Version="2.23.0" />
-    <PackageReference Include="ModelContextProtocol" Version="1.3.0" />
     <PackageReference Include="Microsoft.Azure.Cosmos" Version="3.60.0" />
     <PackageReference Include="Azure.Identity" Version="1.21.0" />
     <PackageReference Include="Microsoft.Extensions.Azure" Version="1.14.0" />