docs: improve nodetool getendpoints documentation

Clarified and expanded the documentation for the nodetool getendpoints command,
including detailed explanations of the --key and --key-components options.
Added examples demonstrating usage with simple and composite partition keys.

Closes scylladb/scylladb#26529

docs/operating-scylla/nodetool-commands/getendpoints.rst

@@ -1,6 +1,7 @@
 Nodetool getendpoints
 =====================
 **getendpoints** - :code:`<keyspace>` :code:`<table>` :code:`<key>`- Print the end-points IP or name of the nodes that own the partition key.
+**getendpoints** - :code:`<keyspace>` :code:`<table>` :code:`<key-components>` - Print the end-points IP or name of the nodes that own the partition key.
 
 Use this command to know which node holds the specific partition key.
 
@@ -17,23 +18,83 @@ table           table name
 --------------  --------------
 key             partition key
 --------------  --------------
-key-components  partition key (alternative to key)
+key-components  partition key (Alternative way to specify composite partition keys using individual components.)
 ==============  ==============
 
 In a case of a composite partition key, use ``:`` between columns in the key. All columns in the partition key are required.
-Alternatively, you can use the ``--key-components`` option to specify each component of the partition key separately.
-For example:
-
-.. code:: 
-
-   cqlsh:mykeyspace> CREATE TABLE superheroes (firstname text, lastname text, age int, PRIMARY KEY ((firstname, lastname)));
-
-.. code:: 
-
-   nodetool getendpoints mykeyspace superheroes "peter:parker"
-
+Alternatively, you can use the ``--key-components`` option to specify each component of the partition key separately,
+instead of combining them into a single colon-separated string.
+This approach avoids ambiguity when key values contain colons.
+All partition key columns must be specified, and they must be provided in the correct order as defined in the table schema.
+You must specify either the ``--key`` or the ``--key-components`` option, but not both.
 
 ScyllaDB does not support *getendpoints* for a partition key with a frozen UDT.
-    
+
+**Example 1: Single partition key**
+
+.. code-block:: cql
+
+   CREATE TABLE superheroes (
+      firstname text,
+      lastname text,
+      age int,
+      PRIMARY KEY (firstname)
+   );
+
+.. code-block:: bash
+
+   nodetool getendpoints "superheroes" "peter"
+
+This retrieves the nodes responsible for the partition key ``peter`` in the ``superheroes`` table.
+
+**Example 2: Composite partition key (specified as colon-separated string)**
+
+.. code-block:: cql
+
+   CREATE TABLE superheroes (
+      firstname text,
+      lastname text,
+      age int,
+      PRIMARY KEY ((firstname, lastname))
+   );
+
+.. code-block:: bash
+
+   nodetool getendpoints "mykeyspace" "superheroes" "peter:parker"
+
+When using a composite partition key, separate the components with a colon (`:`) in the order defined in the schema.
+
+**Example 3: Composite partition key (specified by individual components)**
+
+.. code-block:: cql
+
+   CREATE TABLE superheroes (
+      firstname text,
+      lastname text,
+      age int,
+      PRIMARY KEY ((firstname, lastname))
+   );
+
+.. code-block:: bash
+
+   nodetool getendpoints "mykeyspace" "superheroes" --key-components "peter" --key-components "parker"
+
+**Example 4: Composite partition key with colon**
+
+.. code-block:: cql
+
+   CREATE TABLE superheroes (
+      firstname text,
+      lastname text,
+      age int,
+      PRIMARY KEY ((firstname, lastname))
+   );
+
+.. code-block:: bash
+
+   nodetool getendpoints "mykeyspace" "superheroes" --key-components "peter:the-great" --key-components "parker"
+
+In this example, the first key component includes a colon, which would cause parsing issues in the string format.
+Using ``--key-components`` ensures it's interpreted correctly.
 
 .. include:: nodetool-index.rst