# fbi.crime.national_annual

Retrieve national year-over-year annual crime totals from FBI UCR data, aggregated from monthly reporting. Returns total offense counts, average rate per 100,000 population, total clearances, and clearance rate percentage for each calendar year. Supports date ranges spanning multiple decades (data available from 1979). Ideal for long-term trend analysis: "Has the US murder rate declined since the 1990s?" or "What are 10-year property crime trends?". Source: FBI UCR / CDE, US Gov public domain, no auth required.

Agent View of the PolicyLayer registry record for `fbi.crime.national_annual`. HTML page: https://policylayer.com/tools/io-github-whiteknightonhorse-apibase/fbi.crime.national-annual

## Facts

- Tool: `fbi.crime.national_annual`
- Server: Apibase (`apibase-mcp-client`) — https://policylayer.com/tools/io-github-whiteknightonhorse-apibase.md
- Install: `npx -y apibase-mcp-client`
- Homepage: https://github.com/whiteknightonhorse/APIbase
- Risk category: Read (Low risk)
- Registry record: grade F, identity unverified
- Server auth posture: open
- Server rate-limited: no
- Parameters: 3 (1 required)
- Recommended policy verdict: Allowed

## Parameters

| Parameter | Type | Required | Description |
| --- | --- | --- | --- |
| `to_year` | integer | no | End year for annual trend data inclusive (e.g. 2022). Defaults to last full year. |
| `from_year` | integer | no | Start year for annual trend data (e.g. 2010). Data available from 1979. |
| `offense_type` | string | yes | FBI UCR offense category. violent-crime (murder+rape+robbery+assault), property-crime (burglary+larceny+auto+arson), or individual offense type |

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.crime.national_annual",
    "arguments": {
      "offense_type": "<offense_type>"
    }
  }
}
```

## Why fbi.crime.national_annual is rated Low

Tool queries public FBI crime statistics with no write, delete, execute, or financial capabilities.

From the tool's own definition: "Retrieve national year-over-year annual crime totals from FBI UCR data"

## Use case

AI agents call fbi.crime.national_annual to retrieve information from Apibase 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 Apibase:

```json
{
  "version": "1",
  "default": "deny",
  "tools": {
    "fbi.crime.national_annual": {}
  }
}
```

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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`

---

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