# system-commonFileType

Returns a commonly used file type.

Agent View of the PolicyLayer registry record for `system-commonFileType`. HTML page: https://policylayer.com/tools/kentrino-faker-mcp-server/system-commonfiletype

## Facts

- Tool: `system-commonFileType`
- Server: Faker MCP Server (`kentrino/faker-mcp-server`) — https://policylayer.com/tools/kentrino-faker-mcp-server.md
- Homepage: https://github.com/kentrino/faker-mcp-server
- Risk category: Read (Low risk)
- Registry record: grade C, identity unverified
- 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": "system-commonFileType",
    "arguments": {}
  }
}
```

## Why system-commonFileType is rated Low

This tool generates and returns fake data (a file type string) using Faker.js. It has no side effects, does not modify any data, and purely produces synthetic output. Lowest possible blast radius.

From the tool's own definition: "Returns a commonly used file type"

Risk signals: Admin/system-level operation

## Use case

AI agents call system-commonFileType to retrieve information from Faker MCP Server 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 Faker MCP Server:

```json
{
  "version": "1",
  "default": "deny",
  "tools": {
    "system-commonFileType": {}
  }
}
```

## Other tools on Faker MCP Server (228)

- `airline-aircraftType` — Read — https://policylayer.com/tools/kentrino-faker-mcp-server/airline-aircrafttype.md
- `airline-airline-iataCode` — Read — https://policylayer.com/tools/kentrino-faker-mcp-server/airline-airline-iatacode.md
- `airline-airline-name` — Read — https://policylayer.com/tools/kentrino-faker-mcp-server/airline-airline-name.md
- `airline-airplane-iataTypeCode` — Read — https://policylayer.com/tools/kentrino-faker-mcp-server/airline-airplane-iatatypecode.md
- `airline-airplane-name` — Read — https://policylayer.com/tools/kentrino-faker-mcp-server/airline-airplane-name.md
- `airline-airport-iataCode` — Read — https://policylayer.com/tools/kentrino-faker-mcp-server/airline-airport-iatacode.md
- `airline-airport-name` — Read — https://policylayer.com/tools/kentrino-faker-mcp-server/airline-airport-name.md
- `airline-flightNumber` — Read — https://policylayer.com/tools/kentrino-faker-mcp-server/airline-flightnumber.md
- `airline-recordLocator` — Read — https://policylayer.com/tools/kentrino-faker-mcp-server/airline-recordlocator.md
- `airline-seat` — Read — https://policylayer.com/tools/kentrino-faker-mcp-server/airline-seat.md
- `animal-bear` — Read — https://policylayer.com/tools/kentrino-faker-mcp-server/animal-bear.md
- `animal-bird` — Read — https://policylayer.com/tools/kentrino-faker-mcp-server/animal-bird.md
- `animal-cat` — Read — https://policylayer.com/tools/kentrino-faker-mcp-server/animal-cat.md
- `animal-cetacean` — Read — https://policylayer.com/tools/kentrino-faker-mcp-server/animal-cetacean.md
- `animal-cow` — Read — https://policylayer.com/tools/kentrino-faker-mcp-server/animal-cow.md
- `animal-crocodilia` — Read — https://policylayer.com/tools/kentrino-faker-mcp-server/animal-crocodilia.md
- `animal-dog` — Read — https://policylayer.com/tools/kentrino-faker-mcp-server/animal-dog.md
- `animal-fish` — Read — https://policylayer.com/tools/kentrino-faker-mcp-server/animal-fish.md
- `animal-horse` — Read — https://policylayer.com/tools/kentrino-faker-mcp-server/animal-horse.md
- `animal-insect` — Read — https://policylayer.com/tools/kentrino-faker-mcp-server/animal-insect.md
- `animal-lion` — Read — https://policylayer.com/tools/kentrino-faker-mcp-server/animal-lion.md
- `animal-petName` — Read — https://policylayer.com/tools/kentrino-faker-mcp-server/animal-petname.md
- `animal-rabbit` — Read — https://policylayer.com/tools/kentrino-faker-mcp-server/animal-rabbit.md
- `animal-rodent` — Read — https://policylayer.com/tools/kentrino-faker-mcp-server/animal-rodent.md
- `animal-snake` — Read — https://policylayer.com/tools/kentrino-faker-mcp-server/animal-snake.md
- `animal-type` — Read — https://policylayer.com/tools/kentrino-faker-mcp-server/animal-type.md
- `book-author` — Read — https://policylayer.com/tools/kentrino-faker-mcp-server/book-author.md
- `book-format` — Read — https://policylayer.com/tools/kentrino-faker-mcp-server/book-format.md
- `book-genre` — Read — https://policylayer.com/tools/kentrino-faker-mcp-server/book-genre.md
- `book-publisher` — Read — https://policylayer.com/tools/kentrino-faker-mcp-server/book-publisher.md
- …and 198 more: https://policylayer.com/tools/kentrino-faker-mcp-server.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=kentrino-faker-mcp-server · API: https://policylayer.com/registry/api · Policy library: https://policylayer.com/policies/kentrino-faker-mcp-server