diff --git a/specification/src/specification/capabilities.md b/specification/src/specification/capabilities.md
index 7d4f4b41..87c71529 100644
--- a/specification/src/specification/capabilities.md
+++ b/specification/src/specification/capabilities.md
@@ -22,10 +22,9 @@ See [`CapabilitiesResponse`](../reference/types.md#capabilitiesresponse)
 
 | Name | Description |
 |------|-------------|
-| `versions` | A [semantic versioning](https://semver.org) range of API versions which the data connector
-| `capabilities.explain` | Whether the data connector is capable of describing query plans |claims to implement |
-| `capabilities.mutation` | Whether the data connector is capable of executing mutations |claims to implement |
-| `capabilities.mutation.transactional` | Whether the data connector is capable of executing multiple mutations in a transaction |claims to implement |
+| `versions` | A [semantic versioning](https://semver.org) range of API versions which the data connector |
+| `capabilities.explain` | Whether the data connector is capable of describing query plans |
+| `capabilities.mutation.transactional` | Whether the data connector is capable of executing multiple mutations in a transaction |
 | `capabilities.query.aggregates` | Whether the data connector supports [aggregate queries](queries/aggregates.md) |
 | `capabilities.query.variables` | Whether the data connector supports [queries with variables](queries/variables.md) |
 | `capabilities.relationships` | Whether the data connector supports [relationships](queries/relationships.md) |
diff --git a/specification/src/specification/mutations/README.md b/specification/src/specification/mutations/README.md
index e184a912..8b6a16e0 100644
--- a/specification/src/specification/mutations/README.md
+++ b/specification/src/specification/mutations/README.md
@@ -25,6 +25,15 @@ See [`MutationRequest`](../../reference/types.md#mutationrequest)
 
 Each operation is described by a [`MutationOperation`](../../reference/types.md#mutationoperation) structure, which can be one of several types. However, currently [procedures](./procedures.md) are the only supported operation type.
 
+### Multiple Operations
+
+If the `mutation.transactional` capability is enabled, then the caller may provide multiple operations in a single request.
+Otherwise, the caller must provide exactly one operation.
+
+The intent is that multiple operations ought to be performed together in a single transaction.
+That is, they should all succeed, or all fail together. If any operation fails, then a single `ErrorResponse` should capture
+the failure, and none of the operations should effect any changes to the data source.
+
 ## Response
 
 See [`MutationResponse`](../../reference/types.md#mutationresponse)