# list_hosts

List every configured host with its status (default flag and cert availability).

Agent View of the PolicyLayer registry record for `list_hosts`. HTML page: https://policylayer.com/tools/acato-ebay-mcp/list-hosts

## Facts

- Tool: `list_hosts`
- Server: Ebay (`acato/ebay-mcp`) — https://policylayer.com/tools/acato-ebay-mcp.md
- Homepage: https://github.com/acato/ebay-mcp
- Risk category: Read (Low risk)
- Registry record: grade D, 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": "list_hosts",
    "arguments": {}
  }
}
```

## Why list_hosts is rated Low

This tool performs a read-only operation that returns information about configured hosts and their statuses. There are no side effects, no data modification, no code execution, and no financial impact. It is a simple informational query, making it a Read category tool with low severity since the blast radius of misuse is minimal—an attacker could only learn about host configurations but not modify or delete them.

From the tool's own definition: "Tool name 'list_hosts' with description 'List every configured host with its status (default flag and cert availability)' indicates a retrieval operation that queries configuration data without modifying or executing anything."

Risk signals: Bulk/mass operation — affects multiple targets

## Use case

AI agents call list_hosts to retrieve information from Ebay 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 Ebay:

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

## Other tools on Ebay (14)

- `start_user_auth` — Execute — https://policylayer.com/tools/acato-ebay-mcp/start-user-auth.md
- `buy_now` — Financial — https://policylayer.com/tools/acato-ebay-mcp/buy-now.md
- `make_best_offer` — Financial — https://policylayer.com/tools/acato-ebay-mcp/make-best-offer.md
- `place_bid` — Financial — https://policylayer.com/tools/acato-ebay-mcp/place-bid.md
- `get_active_bids` — Read — https://policylayer.com/tools/acato-ebay-mcp/get-active-bids.md
- `get_item` — Read — https://policylayer.com/tools/acato-ebay-mcp/get-item.md
- `get_lost_items` — Read — https://policylayer.com/tools/acato-ebay-mcp/get-lost-items.md
- `get_watchlist` — Read — https://policylayer.com/tools/acato-ebay-mcp/get-watchlist.md
- `get_won_items` — Read — https://policylayer.com/tools/acato-ebay-mcp/get-won-items.md
- `search` — Read — https://policylayer.com/tools/acato-ebay-mcp/search.md
- `server_info` — Read — https://policylayer.com/tools/acato-ebay-mcp/server-info.md
- `add_to_watchlist` — Write — https://policylayer.com/tools/acato-ebay-mcp/add-to-watchlist.md
- `complete_user_auth` — Write — https://policylayer.com/tools/acato-ebay-mcp/complete-user-auth.md
- `remove_from_watchlist` — Write — https://policylayer.com/tools/acato-ebay-mcp/remove-from-watchlist.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=acato-ebay-mcp · API: https://policylayer.com/registry/api · Policy library: https://policylayer.com/policies/acato-ebay-mcp