Indicate that component filter args must always be strings

[derek-etherton-opslevel]

Problem

Our components API only accepts strings for args, but agents will often try to pass numbers.

Solution

Add a note to the input that Arg must always be string.

Checklist

• I have run this code, and it appears to resolve the stated issue.
• This PR has no user interface changes or has already received approval from product management to change the interface.
• Make a changie entry that explains the customer facing outcome of this change.

[rocktavious]

Look at that it even fixes the nesting!