DOCS-12247: additional disambiguation for query

Author: Kay Kim

source/reference/method/db.killOp.txt

@@ -38,7 +38,7 @@ Kill Read Operations
 
 Starting in MongoDB 4.0
    The :method:`db.killOp()` method can be run on a
-   :binary:`~bin.mongos` and can kill queries that are running on more
+   :binary:`~bin.mongos` and can kill queries (read operations) that are running on more
    than one shard in a cluster.
 
    For example, to kill a query operation on a MongoDB 4.0+ sharded
@@ -84,7 +84,7 @@ Starting in MongoDB 4.0
            name: From a shard member
            content: |
 
-               Alternatively, you can find and kill the operation from a
+               Alternatively, you can find and kill the read operation from a
                shard member where the operation is running. MongoDB 4.0+
                propagates the kill operation to the other shards and
                :binary:`~bin.mongos` instances: