diff --git a/src/bulk/common.ts b/src/bulk/common.ts
index 078b122c5c..0e782b5702 100644
--- a/src/bulk/common.ts
+++ b/src/bulk/common.ts
@@ -87,8 +87,12 @@ export interface ReplaceOneModel<TSchema extends Document = Document> {
 export interface UpdateOneModel<TSchema extends Document = Document> {
   /** The filter to limit the updated documents. */
   filter: Filter<TSchema>;
-  /** A document or pipeline containing update operators. */
-  update: UpdateFilter<TSchema> | UpdateFilter<TSchema>[];
+  /**
+   * The modifications to apply. The value can be either:
+   * UpdateFilter<TSchema> - A document that contains update operator expressions,
+   * Document[] - an aggregation pipeline.
+   */
+  update: UpdateFilter<TSchema> | Document[];
   /** A set of filters specifying to which array elements an update should apply. */
   arrayFilters?: Document[];
   /** Specifies a collation. */
@@ -103,8 +107,12 @@ export interface UpdateOneModel<TSchema extends Document = Document> {
 export interface UpdateManyModel<TSchema extends Document = Document> {
   /** The filter to limit the updated documents. */
   filter: Filter<TSchema>;
-  /** A document or pipeline containing update operators. */
-  update: UpdateFilter<TSchema> | UpdateFilter<TSchema>[];
+  /**
+   * The modifications to apply. The value can be either:
+   * UpdateFilter<TSchema> - A document that contains update operator expressions,
+   * Document[] - an aggregation pipeline.
+   */
+  update: UpdateFilter<TSchema> | Document[];
   /** A set of filters specifying to which array elements an update should apply. */
   arrayFilters?: Document[];
   /** Specifies a collation. */
diff --git a/src/collection.ts b/src/collection.ts
index d12bbe31ee..a735a3a082 100644
--- a/src/collection.ts
+++ b/src/collection.ts
@@ -339,13 +339,17 @@ export class Collection<TSchema extends Document = Document> {
   /**
    * Update a single document in a collection
    *
+   * The value of `update` can be either:
+   * - UpdateFilter<TSchema> - A document that contains update operator expressions,
+   * - Document[] - an aggregation pipeline.
+   *
    * @param filter - The filter used to select the document to update
-   * @param update - The update operations to be applied to the document
+   * @param update - The modifications to apply
    * @param options - Optional settings for the command
    */
   async updateOne(
     filter: Filter<TSchema>,
-    update: UpdateFilter<TSchema> | Partial<TSchema>,
+    update: UpdateFilter<TSchema> | Document[],
     options?: UpdateOptions
   ): Promise<UpdateResult<TSchema>> {
     return executeOperation(
@@ -385,13 +389,17 @@ export class Collection<TSchema extends Document = Document> {
   /**
    * Update multiple documents in a collection
    *
-   * @param filter - The filter used to select the documents to update
-   * @param update - The update operations to be applied to the documents
+   * The value of `update` can be either:
+   * - UpdateFilter<TSchema> - A document that contains update operator expressions,
+   * - Document[] - an aggregation pipeline.
+   *
+   * @param filter - The filter used to select the document to update
+   * @param update - The modifications to apply
    * @param options - Optional settings for the command
    */
   async updateMany(
     filter: Filter<TSchema>,
-    update: UpdateFilter<TSchema>,
+    update: UpdateFilter<TSchema> | Document[],
     options?: UpdateOptions
   ): Promise<UpdateResult<TSchema>> {
     return executeOperation(
diff --git a/src/mongo_types.ts b/src/mongo_types.ts
index 5682ecf878..f201a50eb6 100644
--- a/src/mongo_types.ts
+++ b/src/mongo_types.ts
@@ -243,7 +243,11 @@ export type SetFields<TSchema> = ({
   readonly [key in KeysOfAType<TSchema, ReadonlyArray<any> | undefined>]?:
     | OptionalId<Flatten<TSchema[key]>>
     | AddToSetOperators<Array<OptionalId<Flatten<TSchema[key]>>>>;
-} & NotAcceptedFields<TSchema, ReadonlyArray<any> | undefined>) & {
+} & IsAny<
+  TSchema[keyof TSchema],
+  object,
+  NotAcceptedFields<TSchema, ReadonlyArray<any> | undefined>
+>) & {
   readonly [key: string]: AddToSetOperators<any> | any;
 };
 
diff --git a/test/types/community/collection/bulkWrite.test-d.ts b/test/types/community/collection/bulkWrite.test-d.ts
index 5c8ee78ecf..f47044eb92 100644
--- a/test/types/community/collection/bulkWrite.test-d.ts
+++ b/test/types/community/collection/bulkWrite.test-d.ts
@@ -1,6 +1,6 @@
 import { expectError } from 'tsd';
 
-import { MongoClient, ObjectId } from '../../../mongodb';
+import { type Collection, type Document, MongoClient, ObjectId } from '../../../mongodb';
 
 // TODO(NODE-3347): Improve these tests to use more expect assertions
 
@@ -297,3 +297,197 @@ collectionType.bulkWrite([
     }
   }
 ]);
+
+{
+  // NODE-5647 - Type error with $addToSet in bulkWrite
+  interface TestDocument {
+    readonly myId: number;
+    readonly mySet: number[];
+    readonly myAny: any;
+  }
+  const collection = undefined as unknown as Collection<TestDocument>;
+  expectError(
+    collection.bulkWrite([
+      {
+        updateOne: {
+          filter: { myId: 0 },
+          update: {
+            $addToSet: { mySet: 'value of other type' }
+          }
+        }
+      }
+    ])
+  );
+  collection.bulkWrite([
+    {
+      updateOne: {
+        filter: { myId: 0 },
+        update: {
+          $addToSet: { mySet: 0 }
+        }
+      }
+    }
+  ]);
+  collection.bulkWrite([
+    {
+      updateOne: {
+        filter: { myId: 0 },
+        update: {
+          $addToSet: { myAny: 1 }
+        }
+      }
+    }
+  ]);
+  collection.bulkWrite([
+    {
+      updateOne: {
+        filter: { myId: 0 },
+        update: [
+          {
+            $addToSet: { myAny: 0 }
+          }
+        ]
+      }
+    }
+  ]);
+  expectError(
+    collection.bulkWrite([
+      {
+        updateMany: {
+          filter: { myId: 0 },
+          update: {
+            $addToSet: { mySet: 'value of other type' }
+          }
+        }
+      }
+    ])
+  );
+  collection.bulkWrite([
+    {
+      updateMany: {
+        filter: { myId: 0 },
+        update: {
+          $addToSet: { mySet: 0 }
+        }
+      }
+    }
+  ]);
+  collection.bulkWrite([
+    {
+      updateMany: {
+        filter: { myId: 0 },
+        update: {
+          $addToSet: { myAny: 1 }
+        }
+      }
+    }
+  ]);
+  collection.bulkWrite([
+    {
+      updateMany: {
+        filter: { myId: 0 },
+        update: [
+          {
+            $addToSet: { mySet: 0 }
+          }
+        ]
+      }
+    }
+  ]);
+
+  interface IndexSingatureTestDocument extends Document {
+    readonly myId: number;
+    readonly mySet: number[];
+  }
+  const indexSingatureCollection = undefined as unknown as Collection<IndexSingatureTestDocument>;
+  indexSingatureCollection.bulkWrite([
+    {
+      updateOne: {
+        filter: { myId: 0 },
+        update: {
+          $addToSet: { mySet: 0 }
+        }
+      }
+    }
+  ]);
+  indexSingatureCollection.bulkWrite([
+    {
+      updateOne: {
+        filter: { myId: 0 },
+        update: [
+          {
+            $addToSet: { mySet: 0 }
+          }
+        ]
+      }
+    }
+  ]);
+  indexSingatureCollection.bulkWrite([
+    {
+      updateMany: {
+        filter: { myId: 0 },
+        update: {
+          $addToSet: { mySet: 0 }
+        }
+      }
+    }
+  ]);
+  indexSingatureCollection.bulkWrite([
+    {
+      updateMany: {
+        filter: { myId: 0 },
+        update: [
+          {
+            $addToSet: { mySet: 0 }
+          }
+        ]
+      }
+    }
+  ]);
+
+  const collectionOfAnyType = undefined as unknown as Collection<any>;
+  collectionOfAnyType.bulkWrite([
+    {
+      updateOne: {
+        filter: { myId: 0 },
+        update: {
+          $addToSet: { mySet: 0 }
+        }
+      }
+    }
+  ]);
+  collectionOfAnyType.bulkWrite([
+    {
+      updateOne: {
+        filter: { myId: 0 },
+        update: [
+          {
+            $addToSet: { mySet: 0 }
+          }
+        ]
+      }
+    }
+  ]);
+  collectionOfAnyType.bulkWrite([
+    {
+      updateMany: {
+        filter: { myId: 0 },
+        update: {
+          $addToSet: { mySet: 0 }
+        }
+      }
+    }
+  ]);
+  collectionOfAnyType.bulkWrite([
+    {
+      updateMany: {
+        filter: { myId: 0 },
+        update: [
+          {
+            $addToSet: { mySet: 0 }
+          }
+        ]
+      }
+    }
+  ]);
+}
diff --git a/test/types/community/collection/updateX.test-d.ts b/test/types/community/collection/updateX.test-d.ts
index b729b20b4d..5ea59cd525 100644
--- a/test/types/community/collection/updateX.test-d.ts
+++ b/test/types/community/collection/updateX.test-d.ts
@@ -439,3 +439,66 @@ export async function testPushWithId(): Promise<void> {
     collectionWithSchema.updateMany({}, {})
   );
 }
+
+{
+  // NODE-5647 - Type error with $addToSet in bulkWrite
+  interface TestDocument {
+    readonly myId: number;
+    readonly mySet: number[];
+    readonly myAny: any;
+  }
+  const collection = undefined as unknown as Collection<TestDocument>;
+  expectError(collection.updateOne({ myId: 0 }, { $addToSet: { mySet: 'value of other type' } }));
+  collection.updateOne({ myId: 0 }, { $addToSet: { mySet: 0 } });
+  collection.updateOne({ myId: 0 }, { $addToSet: { myAny: 1 } });
+  collection.updateOne({ myId: 0 }, [
+    {
+      $addToSet: { mySet: 0 }
+    }
+  ]);
+  expectError(collection.updateMany({ myId: 0 }, { $addToSet: { mySet: 'value of other type' } }));
+  collection.updateMany({ myId: 0 }, { $addToSet: { mySet: 0 } });
+  collection.updateMany({ myId: 0 }, { $addToSet: { myAny: 1 } });
+  collection.updateMany({ myId: 0 }, [
+    {
+      $addToSet: { mySet: 0 }
+    }
+  ]);
+
+  interface IndexSingatureTestDocument extends Document {
+    readonly myId: number;
+    readonly mySet: number[];
+    readonly myAny: any;
+  }
+  const indexSingatureCollection = undefined as unknown as Collection<IndexSingatureTestDocument>;
+  indexSingatureCollection.updateOne({ myId: 0 }, { $addToSet: { mySet: 0 } });
+  indexSingatureCollection.updateOne({ myId: 0 }, { $addToSet: { myAny: 1 } });
+  indexSingatureCollection.updateOne({ myId: 0 }, [
+    {
+      $addToSet: { mySet: 0 }
+    }
+  ]);
+  indexSingatureCollection.updateMany({ myId: 0 }, { $addToSet: { mySet: 0 } });
+  indexSingatureCollection.updateMany({ myId: 0 }, { $addToSet: { myAny: 1 } });
+  indexSingatureCollection.updateMany({ myId: 0 }, [
+    {
+      $addToSet: { mySet: 0 }
+    }
+  ]);
+
+  const collectionOfAnyType = undefined as unknown as Collection<any>;
+  collectionOfAnyType.updateOne({ myId: 0 }, { $addToSet: { mySet: 0 } });
+  collectionOfAnyType.updateOne({ myId: 0 }, { $addToSet: { myAny: 1 } });
+  collectionOfAnyType.updateOne({ myId: 0 }, [
+    {
+      $addToSet: { mySet: 0 }
+    }
+  ]);
+  collectionOfAnyType.updateMany({ myId: 0 }, { $addToSet: { mySet: 0 } });
+  collectionOfAnyType.updateMany({ myId: 0 }, { $addToSet: { myAny: 1 } });
+  collectionOfAnyType.updateMany({ myId: 0 }, [
+    {
+      $addToSet: { mySet: 0 }
+    }
+  ]);
+}