The document discusses tools and frameworks for analyzing a city's food sector. It introduces two tools: 1) The PMCC framework categorizes organizations in the food sector into four overlapping groups to better understand their scope and potential for investment. 2) The CHESS matrix explores trade-offs between factors like health, economic prosperity, and food security, which were used to analyze activities like Digbeth Dining Club and Coca-Cola ParkLives. Additional tools discussed include considering the scale of feeding an entire city's population, thinking "middle-up-down" to examine decisions across different levels, and using different metaphors to generate different perspectives on issues like obesity.