I put together a limited Action in one of my homebrew Artificer subclass's features, to show an accurate partial stat-block in a snippet. I based it on the implementation of the Wildfire Spirit from the Wildfire Druid. I made the action General, with Reset Type: Other and Activation Type: Bonus Action (just because you use a bonus action to command it, but you can use Special instead.)

Here is what I used for the snippet:

• <strong>Armor Class: 13</strong> (natural)
• <strong>Saving Throws:</strong> DEX {{2+proficiency#signed}}
• <strong>Skills:</strong> Perception {{2*proficiency#signed}}, Stealth {{2+proficiency#signed}}
• <em><strong>Evasion.</strong></em>
• <em><strong>Force Strike.</strong> Ranged Weapon Attack:</em> {{spellattack:int}} to hit, range 30 ft., one target you can see. <em>Hit:</em> <strong>1d4</strong>{{proficiency#signed}} force damage.
• <em><strong>Channel Magic.</strong></em> The homunculus delivers a spell you cast that has a range of touch. The homunculus must be within 120 feet of you.
<strong>Hit Points:</strong> {{1+modifier:int+classlevel#unsigned}} ({{classlevel}}<strong>d4</strong>)

The limited use value is for the homunculus's HP, and requires a separate Limited Use Data for each artificer level. They each need to be:

Number of Uses: {1 + artificer level}, Stat Modifier Operator: + (Addition), Stat Modifier: INT, Level: {artificer level} (leave Use Proficiency Bonus unchecked)

Enjoy and Happy Holidays!