# fbi_cde_state_crime_trend

Return a bounded monthly trend for one state and one FBI summarized UCR offense category from LiveDataLink's self-hosted official CDE aggregate snapshot. Fields include reported offenses and clearances, rates per 100,000 reporting population, full and reporting populations, coverage percentage, pagination, and exact provenance. Use this for 'California violent-crime trend in 2023', 'monthly motor vehicle theft reported in Texas', or 'did coverage change during this state trend?'. Crimes known to law enforcement only; never use for cross-state rankings or individual decisions.

Agent View of the PolicyLayer registry record for `fbi_cde_state_crime_trend`. HTML page: https://policylayer.com/tools/io-github-blackboxfoundry-livedatalink/fbi-cde-state-crime-trend

## Facts

- Tool: `fbi_cde_state_crime_trend`
- Server: Livedatalink (`https://livedatalink.ai/mcp`) — https://policylayer.com/tools/io-github-blackboxfoundry-livedatalink.md
- Homepage: https://github.com/blackboxfoundry/livedatalink
- Risk category: Read (Low risk)
- Registry record: grade F, identity unverified
- Server auth posture: open
- Server CORS policy: *
- Server rate-limited: no
- Parameters: 7 (4 required)
- Recommended policy verdict: Allowed

## Parameters

| Parameter | Type | Required | Description |
| --- | --- | --- | --- |
| `limit` | integer | no | Maximum monthly observations. Default 24. |
| `state` | string | yes | Two-letter U.S. state or District of Columbia abbreviation; US is not accepted. |
| `offset` | integer | no | Monthly observations to skip. Default 0. |
| `offense` | string | yes | FBI CDE summarized offense category. Aggregate categories overlap their component offenses. |
| `end_month` | string | yes | Calendar month in YYYY-MM format within the hosted snapshot. |
| `start_month` | string | yes | Calendar month in YYYY-MM format within the hosted snapshot. |
| `response_format` | string | no | Human-readable markdown or machine-readable JSON. Default markdown. |

Parameters from the server's own tool schema.

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

```json
{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "tools/call",
  "params": {
    "name": "fbi_cde_state_crime_trend",
    "arguments": {
      "state": "<state>",
      "offense": "<offense>",
      "end_month": "<end_month>",
      "start_month": "<start_month>"
    }
  }
}
```

## Why fbi_cde_state_crime_trend is rated Low

Even though fbi_cde_state_crime_trend 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.

## Use case

AI agents call fbi_cde_state_crime_trend to retrieve information from Livedatalink 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 Livedatalink:

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

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## 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`

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