diff --git a/docs/mcp-contracts.md b/docs/mcp-contracts.md
index b8452922e..7052a0372 100644
--- a/docs/mcp-contracts.md
+++ b/docs/mcp-contracts.md
@@ -252,7 +252,7 @@ Collections are `documents`, `nodes`, `edges`, and `coverage`; for nodes and
 edges an optional `document` keeps rows whose evidence names that exact decoded
 `relative_path`, and an undecoded path is refused. The summary keeps every
 decoded document, the provider, node-kind, edge-relation and coverage-status
-counts, and decoder truncation. Each page repeats `source_truncated`. A complete
+counts, and whether the decoded graph is incomplete. Each page repeats `source_truncated`. A complete
 app graph often exceeds the default MCP response budget (XLD.app: 6.7 MB), so
 select `detail: "summary"` on the first call. Delivery detail never reaches the
 decoder or changes the source Evidence ID.
diff --git a/docs/native-investigation.md b/docs/native-investigation.md
index f0f4d6483..534a0d57e 100644
--- a/docs/native-investigation.md
+++ b/docs/native-investigation.md
@@ -328,7 +328,7 @@ complete observation.
   "Contents/Resources/Base.lproj/MainMenu.nib", offset: 0, limit: 64}`.
   `document` selects rows whose evidence names that exact
   `documents[].relative_path` (nodes and edges only); `source_truncated` keeps
-  decoder truncation visible on every page. `verify:interface-builder` compiles
+  graph incompleteness visible on every page. `verify:interface-builder` compiles
   a source-owned AppKit XIB with `ibtool`. Storyboards require an installed
   iOS platform; unsupported archive forms remain explicit.
   XML plist archives accept UTF-8 and BOM-marked UTF-16 in either byte order.
diff --git a/src/domain/analysisView/interfaceBuilderView.test.ts b/src/domain/analysisView/interfaceBuilderView.test.ts
index 97d2f375b..a591d3194 100644
--- a/src/domain/analysisView/interfaceBuilderView.test.ts
+++ b/src/domain/analysisView/interfaceBuilderView.test.ts
@@ -132,7 +132,7 @@ describe("Interface Builder analysis views", () => {
       items: report().graph.coverage,
       source_truncated: true,
       unknowns: expect.arrayContaining([
-        expect.stringContaining("stopped at a caller-selected bound"),
+        expect.stringContaining("The decoded graph is incomplete"),
       ]),
     });
   });
diff --git a/src/domain/analysisView/interfaceBuilderView.ts b/src/domain/analysisView/interfaceBuilderView.ts
index 80f2c6179..8710795a1 100644
--- a/src/domain/analysisView/interfaceBuilderView.ts
+++ b/src/domain/analysisView/interfaceBuilderView.ts
@@ -188,7 +188,7 @@ export const projectInterfaceBuilderView = (
       "Rows describe recognized archive objects and connections only; unrecognized classes, fields and runtime-created UI remain unknown.",
       ...(graph.truncated
         ? [
-            "The decoder stopped at a caller-selected bound; page exhaustion does not establish absence of undecoded objects or connections.",
+            "The decoded graph is incomplete (see coverage and limitations for the cause); page exhaustion does not establish absence of undecoded objects or connections.",
           ]
         : []),
     ],
diff --git a/tests/boundary/mcp/interfaceBuilderSummaryMcp.test.ts b/tests/boundary/mcp/interfaceBuilderSummaryMcp.test.ts
index 2e59336af..b62fcdf53 100644
--- a/tests/boundary/mcp/interfaceBuilderSummaryMcp.test.ts
+++ b/tests/boundary/mcp/interfaceBuilderSummaryMcp.test.ts
@@ -67,18 +67,7 @@ mcpTest(
     const app = await fixtureApp();
     const client = await openProductionTarget(mcp, onTestFinished, app);
 
-    const complete = await client.callTool({
-      name: "decode_interface_builder",
-      arguments: {},
-    });
-    expect(complete.isError, JSON.stringify(complete.content)).not.toBe(true);
-    const full = evidenceOf(interfaceBuilderAnalysisSchema).parse(
-      complete.structuredContent,
-    );
-    expect(full.parameters).not.toHaveProperty("detail");
-    const report = full.normalized_result;
-    expect(report.documents).toHaveLength(2);
-
+    // Summary first: its own retained parent must serve every later page.
     const summarized = await client.callTool({
       name: "decode_interface_builder",
       arguments: { detail: "summary" },
@@ -89,15 +78,6 @@ mcpTest(
     const summary = evidenceOf(summarySchema).parse(
       summarized.structuredContent,
     ).normalized_result;
-    // Delivery detail never reaches the decoder or the source Evidence ID.
-    expect(summary.parent_evidence_id).toBe(full.evidence_id);
-    expect(summary.summary.documents).toEqual(report.documents);
-    expect(summary.summary.available_counts).toEqual({
-      nodes: report.graph.nodes.length,
-      edges: report.graph.edges.length,
-      coverage: report.graph.coverage.length,
-    });
-
     const source = {
       kind: "retained-evidence",
       evidence_id: summary.parent_evidence_id,
@@ -122,16 +102,37 @@ mcpTest(
       }
       return rows;
     };
-    expect(await readAll({ collection: "edges" })).toEqual(report.graph.edges);
     const main = "Contents/Resources/Main.nib";
-    const mainNodes = report.graph.nodes.filter(({ evidence }) =>
+    const edges = await readAll({ collection: "edges" });
+    const mainNodes = await readAll({ collection: "nodes", document: main });
+
+    // Only then compare with a complete call made for reference.
+    const complete = await client.callTool({
+      name: "decode_interface_builder",
+      arguments: {},
+    });
+    expect(complete.isError, JSON.stringify(complete.content)).not.toBe(true);
+    const full = evidenceOf(interfaceBuilderAnalysisSchema).parse(
+      complete.structuredContent,
+    );
+    expect(full.parameters).not.toHaveProperty("detail");
+    const report = full.normalized_result;
+    expect(report.documents).toHaveLength(2);
+    // Delivery detail never reaches the decoder or the source Evidence ID.
+    expect(summary.parent_evidence_id).toBe(full.evidence_id);
+    expect(summary.summary.documents).toEqual(report.documents);
+    expect(summary.summary.available_counts).toEqual({
+      nodes: report.graph.nodes.length,
+      edges: report.graph.edges.length,
+      coverage: report.graph.coverage.length,
+    });
+    expect(edges).toEqual(report.graph.edges);
+    const expectedMainNodes = report.graph.nodes.filter(({ evidence }) =>
       evidence.some(({ artifact_path }) => artifact_path === main),
     );
-    expect(mainNodes.length).toBeGreaterThan(0);
-    expect(mainNodes.length).toBeLessThan(report.graph.nodes.length);
-    expect(await readAll({ collection: "nodes", document: main })).toEqual(
-      mainNodes,
-    );
+    expect(expectedMainNodes.length).toBeGreaterThan(0);
+    expect(expectedMainNodes.length).toBeLessThan(report.graph.nodes.length);
+    expect(mainNodes).toEqual(expectedMainNodes);
 
     const unknownDocument = await client.callTool({
       name: "inspect_analysis_view",