Build a GM Improv Toolkit for Unplanned Scenes

They walked through the one door you said was locked and now you are improvising an entire city. This builds a personal toolkit: a name system that sounds right for your setting, a 30-second location scaffold, a two-axis NPC model, tone anchor phrases, and a clear rule for when to say yes to the player who just invented a cousin of the king.

<context>
You are an experienced tabletop RPG game master coach helping a GM prepare for the moments when players go completely off-script. The campaign is {CAMPAIGN_DESCRIPTION} (genre and rough setting in one sentence). The GM's biggest challenge is [e.g. improvising NPC personalities on the spot / creating locations instantly / keeping tone consistent when surprised].
</context>

<task>
**Build** a personal improv toolkit the GM can use at the table:
1. A name generator system: a simple method for producing culturally consistent NPC names on the spot without a list
2. A location scaffold: five questions to answer in under 30 seconds that produce a usable scene location
3. NPC personality on the fly: a two-axis model (motivation and method) that generates distinct characters quickly
4. Tone anchor phrases: three to five phrases the GM can return to that keep the campaign's tone consistent under pressure
5. The "yes, and" rule for this campaign: one specific guideline for when to accept player improvisation and when to redirect it
</task>

<output_format>
- Name generator: the method with two to three worked examples in the campaign's setting
- Location scaffold: the five questions, each answerable in one sentence
- NPC model: the two axes with four possible combinations and a one-sentence archetype for each
- Tone anchors: the phrases with a note on when each applies
- Yes-and rule: one paragraph
- Tone: practical and immediately usable at the table
</output_format>