diff --git a/CHANGELOG.md b/CHANGELOG.md
index 99ab3a8b9..9e6988fa5 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -8,6 +8,14 @@ Newest first. `Unreleased` is what is on `main` and not yet tagged.
 
 ## Unreleased
 
+### The Google Drive connector reaches files in shared drives
+
+Drive leaves shared drive items out of any `files.get` or `files.list` request that does not say it
+supports shared drives, and none of the connector's requests said so. A document the person could
+open in a shared drive was "File not found" to `get_file_metadata` and `read_file_content`, and never
+appeared in `search_files` or `list_recent_files`. Those requests now say they support shared drives,
+and the listings ask for shared drive items. Listings keep Drive's default `user` scope rather than
+searching every shared drive.
 ### Google Drive search and recent files leave out what is in the trash
 
 Drive's `files.list` returns trashed files unless the query excludes them, and neither `search_files`
diff --git a/server/src/plugins/google-drive-rest.ts b/server/src/plugins/google-drive-rest.ts
index 52ce99b7b..069443bc8 100644
--- a/server/src/plugins/google-drive-rest.ts
+++ b/server/src/plugins/google-drive-rest.ts
@@ -45,6 +45,21 @@ const PAGE_SIZE = 25;
 const FILE_FIELDS =
   "id,name,mimeType,modifiedTime,webViewLink,size,owners(emailAddress)";
 
+/**
+ * Shared drives as well as My Drive.
+ *
+ * Drive leaves shared drive items out of every `files.get` and `files.list` that does not say it
+ * supports them. A company's documents often live in shared drives, so a file the person could open
+ * came back from `get_file_metadata` and `read_file_content` as a 404 "File not found", and never
+ * came back from a search at all. The listing also has to ask for those items. It keeps Drive's
+ * default `user` corpus, which Google recommends over `allDrives`.
+ */
+const SHARED_DRIVES = { supportsAllDrives: "true" } as const;
+const SHARED_DRIVE_ITEMS = {
+  ...SHARED_DRIVES,
+  includeItemsFromAllDrives: "true",
+} as const;
+
 /**
  * Google's editor formats, and the plain-text export each one has.
  *
@@ -343,6 +358,7 @@ export async function callTool(
     }
 
     const result = await request(connection, "/files", {
+      ...SHARED_DRIVE_ITEMS,
       pageSize: String(PAGE_SIZE),
       fields: `files(${FILE_FIELDS})`,
       // Drive's own ordering for "recent". Search leaves it to relevance.
@@ -364,7 +380,7 @@ export async function callTool(
     const result = await request(
       connection,
       `/files/${encodeURIComponent(fileId)}`,
-      { fields: FILE_FIELDS },
+      { ...SHARED_DRIVES, fields: FILE_FIELDS },
     );
     if (!result.ok) return failure(result.message);
 
@@ -393,7 +409,7 @@ export async function callTool(
     const metadata = await request(
       connection,
       `/files/${encodeURIComponent(fileId)}`,
-      { fields: "id,name,mimeType" },
+      { ...SHARED_DRIVES, fields: "id,name,mimeType" },
     );
     if (!metadata.ok) return failure(metadata.message);
     const file = (await metadata.response.json()) as DriveFile;
@@ -426,6 +442,7 @@ export async function callTool(
           { mimeType: exportAs },
         )
       : await request(connection, `/files/${encodeURIComponent(fileId)}`, {
+          ...SHARED_DRIVES,
           alt: "media",
         });
     if (!content.ok) return failure(content.message);
diff --git a/server/tests/google-drive-rest.test.ts b/server/tests/google-drive-rest.test.ts
index 303ed020a..4053f7231 100644
--- a/server/tests/google-drive-rest.test.ts
+++ b/server/tests/google-drive-rest.test.ts
@@ -399,3 +399,49 @@ describe("reading a file asks Drive what it is first", () => {
     expect(result.text.split("\n\n[truncated")[0]).toBe(`${heading}${filler}`);
   });
 });
+
+/*
+ * Drive leaves shared drive items out of any `files.get` or `files.list` that does not say it supports
+ * them. Without these parameters a document the person could open in a shared drive was a 404 by id
+ * and missing from every search, and shared drives are where many companies keep their documents.
+ */
+describe("a file in a shared drive is reached like one in My Drive", () => {
+  test("both listings ask Drive for shared drive items", async () => {
+    const calls = stubFetch({ files: [] });
+    await callTool(connection, "search_files", { query: "roadmap" });
+    await callTool(connection, "list_recent_files", {});
+
+    expect(calls).toHaveLength(2);
+    for (const call of calls) {
+      const params = new URL(call.url).searchParams;
+      expect(params.get("supportsAllDrives")).toBe("true");
+      expect(params.get("includeItemsFromAllDrives")).toBe("true");
+    }
+  });
+
+  test("looking a file up says the caller supports shared drives", async () => {
+    const calls = stubFetch({ id: "shared1", name: "Plan" });
+    await callTool(connection, "get_file_metadata", { fileId: "shared1" });
+
+    expect(calls).toHaveLength(1);
+    expect(new URL(calls[0].url).searchParams.get("supportsAllDrives")).toBe(
+      "true",
+    );
+  });
+
+  test("reading a file says so on the lookup and on the download", async () => {
+    const calls = stubFetch({
+      id: "shared2",
+      name: "notes.txt",
+      mimeType: "text/plain",
+    });
+    await callTool(connection, "read_file_content", { fileId: "shared2" });
+
+    expect(calls).toHaveLength(2);
+    for (const call of calls) {
+      expect(new URL(call.url).searchParams.get("supportsAllDrives")).toBe(
+        "true",
+      );
+    }
+  });
+});