# list_cities

List every city covered by the Booyah Index with its place count. Call this first if unsure which city name to pass as the city filter in search_places — avoids guessing at spelling or coverage.

Agent View of the PolicyLayer registry record for `list_cities`. HTML page: https://policylayer.com/tools/com-getbooyah-booyah-index/list-cities

## Facts

- Tool: `list_cities`
- Server: Booyah Index (`https://getbooyah.com/api/mcp`) — https://policylayer.com/tools/com-getbooyah-booyah-index.md
- Homepage: https://github.com/https://getbooyah.com/api/mcp
- Risk category: Read (Low risk)
- Registry record: grade C, identity unverified
- Server auth posture: open
- Server CORS policy: *
- Server rate-limited: no
- Parameters: 0
- Recommended policy verdict: Allowed

## Example call (MCP tools/call, JSON-RPC 2.0)

```json
{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "tools/call",
  "params": {
    "name": "list_cities",
    "arguments": {}
  }
}
```

## Why list_cities is rated Low

Even though list_cities only reads data, uncontrolled read access leaks sensitive information and racks up API costs: an agent caught in a retry loop can make thousands of calls a minute without anyone noticing.

Risk signals: Bulk/mass operation — affects multiple targets

## Use case

AI agents call list_cities to retrieve information from Booyah Index without modifying anything. It is typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.

## Recommended policy (PolicyLayer)

Verdict: **Allowed**. Enforced by the PolicyLayer MCP gateway (https://policylayer.com/mcp-gateway) before a call reaches Booyah Index:

```json
{
  "version": "1",
  "default": "deny",
  "tools": {
    "list_cities": {}
  }
}
```

## Other tools on Booyah Index (5)

- `get_place` — Read — https://policylayer.com/tools/com-getbooyah-booyah-index/get-place.md
- `get_product` — Read — https://policylayer.com/tools/com-getbooyah-booyah-index/get-product.md
- `get_store` — Read — https://policylayer.com/tools/com-getbooyah-booyah-index/get-store.md
- `search_places` — Read — https://policylayer.com/tools/com-getbooyah-booyah-index/search-places.md
- `search_products` — Read — https://policylayer.com/tools/com-getbooyah-booyah-index/search-products.md

## For agents

This record is a snapshot. Live verdicts and the full registry:

- Check every server in your MCP config at once: `npx -y policylayer stack`
- Vet a server before you add it: install the mcp-precheck skill — `npx skills add https://policylayer.com` (skill text: https://policylayer.com/skill.md)
- Query the registry over MCP: endpoint `https://api.policylayer.com/mcp` — tools `check_mcp_server`, `check_mcp_stack`, `check_tool`, `search_registry`, `get_change_events`

---

Source: the PolicyLayer MCP registry — one continuously verified record per MCP server. Full record: https://policylayer.com/registry?q=com-getbooyah-booyah-index · API: https://policylayer.com/registry/api · Policy library: https://policylayer.com/policies/com-getbooyah-booyah-index