# list_commodities

Return the full list of symbols served by this API. Use before get_spot_price / get_historical / get_metadata when you don't know which symbols are supported.

Agent View of the PolicyLayer registry record for `list_commodities`. HTML page: https://policylayer.com/tools/dev-goldprice-mcp/list-commodities

## Facts

- Tool: `list_commodities`
- Server: Goldprice Dev (`https://api.goldprice.dev/v1/mcp/`) — https://policylayer.com/tools/dev-goldprice-mcp.md
- Homepage: https://github.com/https://api.goldprice.dev/v1/mcp/
- Risk category: Read (Low risk)
- Registry record: grade C, identity unverified
- Server auth posture: open
- Server rate-limited: yes
- 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_commodities",
    "arguments": {}
  }
}
```

## Why list_commodities is rated Low

This tool queries and retrieves data about available commodity symbols without creating, modifying, deleting, or executing any operations. It is a pure read operation with minimal security risk.

From the tool's own definition: "Tool name 'list_commodities' and description 'Return the full list of symbols served by this API' indicates a retrieval operation with no side effects. The description explicitly states it returns a list for informational purposes before other queries."

## Use case

AI agents call list_commodities to retrieve information from Goldprice Dev 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 Goldprice Dev:

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

## Other tools on Goldprice Dev (7)

- `get_carat` — Read — https://policylayer.com/tools/dev-goldprice-mcp/get-carat.md
- `get_forward_view` — Read — https://policylayer.com/tools/dev-goldprice-mcp/get-forward-view.md
- `get_historical` — Read — https://policylayer.com/tools/dev-goldprice-mcp/get-historical.md
- `get_metadata` — Read — https://policylayer.com/tools/dev-goldprice-mcp/get-metadata.md
- `get_physical_price` — Read — https://policylayer.com/tools/dev-goldprice-mcp/get-physical-price.md
- `get_spot_price` — Read — https://policylayer.com/tools/dev-goldprice-mcp/get-spot-price.md
- `search_docs` — Read — https://policylayer.com/tools/dev-goldprice-mcp/search-docs.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=dev-goldprice-mcp · API: https://policylayer.com/registry/api · Policy library: https://policylayer.com/policies/dev-goldprice-mcp