diff --git a/tests/fixtures/azure-mcp-tool-names.snapshot.json b/tests/fixtures/azure-mcp-tool-names.snapshot.json
index c8f92bad8..2d54618ad 100644
--- a/tests/fixtures/azure-mcp-tool-names.snapshot.json
+++ b/tests/fixtures/azure-mcp-tool-names.snapshot.json
@@ -1,5 +1,6 @@
 {
   "source": "npx -y @azure/mcp server start (initialize + tools/list)",
+  "toolReferenceConvention": "References must match exact tool names from toolNames. Compound forms like <toolName>_* are not supported.",
   "azureMcpVersion": "3.0.0-beta.3+ae9594a1268710e678c0a6c9f9801212b1ee3694",
   "toolNames": [
     "acr",
diff --git a/tests/mcp-tool-references/unit.test.ts b/tests/mcp-tool-references/unit.test.ts
index 7099841f2..ccc302a61 100644
--- a/tests/mcp-tool-references/unit.test.ts
+++ b/tests/mcp-tool-references/unit.test.ts
@@ -56,13 +56,6 @@ describe("Azure MCP tool references in skill markdown", () => {
           continue;
         }
 
-        const hasValidNamespacePrefix = snapshot.toolNames.some((snapshotToolName) =>
-          resolvedToolName.startsWith(`${snapshotToolName}_`),
-        );
-        if (hasValidNamespacePrefix) {
-          continue;
-        }
-
         const relativePath = path.relative(skillsRoot, markdownPath);
         unknownReferences.push(`${toolReference} (${relativePath})`);
       }
@@ -74,11 +67,15 @@ describe("Azure MCP tool references in skill markdown", () => {
   test("snapshot file exists and has expected shape", () => {
     const snapshot = JSON.parse(readFileSync(snapshotPath, "utf8")) as {
       source?: string;
+      toolReferenceConvention?: string;
       azureMcpVersion?: string;
       toolNames?: string[];
     };
 
     expect(typeof snapshot.source).toBe("string");
+    expect(snapshot.toolReferenceConvention).toBe(
+      "References must match exact tool names from toolNames. Compound forms like <toolName>_* are not supported.",
+    );
     expect(typeof snapshot.azureMcpVersion).toBe("string");
     expect(Array.isArray(snapshot.toolNames)).toBe(true);
     expect(snapshot.toolNames?.length).toBeGreaterThan(0);
diff --git a/tests/scripts/update-mcp-tool-snapshot.js b/tests/scripts/update-mcp-tool-snapshot.js
index 2fc22836a..eb8ebdcb1 100644
--- a/tests/scripts/update-mcp-tool-snapshot.js
+++ b/tests/scripts/update-mcp-tool-snapshot.js
@@ -137,6 +137,8 @@ async function main() {
 
   const snapshot = {
     source: "npx -y @azure/mcp server start (initialize + tools/list)",
+    toolReferenceConvention:
+      "References must match exact tool names from toolNames. Compound forms like <toolName>_* are not supported.",
     azureMcpVersion: version,
     toolNames,
   };