diff --git a/docs/mcp-contracts.md b/docs/mcp-contracts.md
index 66487bd010..5eedd9c14c 100644
--- a/docs/mcp-contracts.md
+++ b/docs/mcp-contracts.md
@@ -198,7 +198,9 @@ Custom clients upgrading from 6.1 should follow the
 
 Evidence-producing tools return the complete canonical Evidence record in both
 text and structured content. Read `structuredContent.normalized_result` for the
-operation result and `structuredContent.evidence_id` for its identity. The same
+operation result and `structuredContent.evidence_id` for its identity.
+`raw_result` holds a provider representation distinct from that result, such
+as an upstream tool's original report, and is `null` when there is none. The same
 record is retained in the session bundle. `analysis_profile` is always present:
 a concrete profile object or `null`; either value participates in semantic
 identity. Records omitting this field are rejected. Pass the returned Evidence
diff --git a/src/application/AnalysisProvider.test.ts b/src/application/AnalysisProvider.test.ts
new file mode 100644
index 0000000000..01b6afc17a
--- /dev/null
+++ b/src/application/AnalysisProvider.test.ts
@@ -0,0 +1,22 @@
+import { expect, it } from "vitest";
+
+import { createAnalysisExecution } from "./AnalysisProvider.js";
+
+const PROVIDER = { id: "fixture", name: "Fixture", version: "1" };
+
+it("records no raw result unless the provider supplies a distinct one", () => {
+  const result = { entries: [{ value: "normalized" }] };
+
+  expect(createAnalysisExecution(result, PROVIDER)).toMatchObject({
+    result,
+    rawResult: null,
+  });
+  expect(
+    createAnalysisExecution(result, PROVIDER, {
+      rawResult: { stdout: "raw" },
+    }).rawResult,
+  ).toEqual({ stdout: "raw" });
+  expect(
+    createAnalysisExecution(result, PROVIDER, { rawResult: null }).rawResult,
+  ).toBeNull();
+});
diff --git a/src/application/AnalysisProvider.ts b/src/application/AnalysisProvider.ts
index 99328c1a57..a922cdb400 100644
--- a/src/application/AnalysisProvider.ts
+++ b/src/application/AnalysisProvider.ts
@@ -41,7 +41,13 @@ export interface AnalysisExecution {
   readonly subject: EvidenceSubjectTarget | null;
 }
 
-/** Build a validated atomic provider observation at an adapter boundary. */
+/**
+ * Build a validated atomic provider observation at an adapter boundary.
+ *
+ * Pass `rawResult` only for a provider representation distinct from
+ * `result`. Omitting it records `null` rather than a second complete copy of
+ * the normalized result in every Evidence record and tool response.
+ */
 export const createAnalysisExecution = (
   result: unknown,
   provider: ProviderIdentity,
@@ -56,7 +62,7 @@ export const createAnalysisExecution = (
   result: jsonValueSchema.parse(result),
   rawResult:
     options.rawResult === undefined
-      ? jsonValueSchema.parse(result)
+      ? null
       : jsonValueSchema.parse(options.rawResult),
   provider,
   ...(options.analysisProfile === undefined
diff --git a/tests/boundary/cli/dylibResolutionCli.test.ts b/tests/boundary/cli/dylibResolutionCli.test.ts
index 7a6b12a4d6..c92d265b29 100644
--- a/tests/boundary/cli/dylibResolutionCli.test.ts
+++ b/tests/boundary/cli/dylibResolutionCli.test.ts
@@ -120,6 +120,9 @@ describe("trace-dylib-resolution CLI", () => {
       "Contents/Helpers/tool",
       "Contents/MacOS/App",
     ]);
+    // The normalized result is the provider's only representation; Evidence
+    // must not carry it a second time as raw_result.
+    expect(result.json).toMatchObject({ raw_result: null });
     expect(
       trace.edges.map(({ loader, install_name: name, resolution }) => [
         loader,
diff --git a/tests/composition/directAnalysisCleanup.test.ts b/tests/composition/directAnalysisCleanup.test.ts
index 22fd849428..fcbdbddcba 100644
--- a/tests/composition/directAnalysisCleanup.test.ts
+++ b/tests/composition/directAnalysisCleanup.test.ts
@@ -84,7 +84,7 @@ describe("one-shot analysis cleanup outcomes", () => {
           operation: "read_bytes",
           subject: { local_path: path },
           normalized_result: { observation: "retained result" },
-          raw_result: { observation: "retained result" },
+          raw_result: null,
         },
       },
     });
@@ -198,7 +198,7 @@ describe("managed one-shot cleanup outcomes", () => {
               operation: "inspect_managed_artifact",
               observation: "retained result",
             },
-            rawResult: { observation: "retained result" },
+            rawResult: null,
             provider: { id: "fixture" },
           },
         },