# margin_calls

Gets margin call information.

Agent View of the PolicyLayer registry record for `margin_calls`. HTML page: https://policylayer.com/tools/open-agent-tools-open-stocks-mcp/margin-calls

## Facts

- Tool: `margin_calls`
- Server: Open Stocks MCP (`open-agent-tools/open-stocks-mcp`) — https://policylayer.com/tools/open-agent-tools-open-stocks-mcp.md
- Homepage: https://github.com/Open-Agent-Tools/open-stocks-mcp
- Risk category: Read (Low risk)
- Registry record: grade F, 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": "margin_calls",
    "arguments": {}
  }
}
```

## Why margin_calls is rated Low

This tool retrieves margin call data from the brokerage account without modifying, deleting, or executing any transactions. While margin calls relate to financial accounts, the tool itself only reads/displays information rather than moving money or creating obligations. The read nature and informational context place this in the Read category with low severity.

From the tool's own definition: "Tool name 'margin_calls' with description 'Gets margin call information' indicates a retrieval operation. The verb 'Gets' explicitly describes a read-only query action with no modification of state."

## Use case

AI agents call margin_calls to retrieve information from Open Stocks MCP 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 Open Stocks MCP:

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

## Other tools on Open Stocks MCP (151)

- `cancel_all_option_orders_tool` — Destructive — https://policylayer.com/tools/open-agent-tools-open-stocks-mcp/cancel-all-option-orders-tool.md
- `cancel_all_stock_orders_tool` — Destructive — https://policylayer.com/tools/open-agent-tools-open-stocks-mcp/cancel-all-stock-orders-tool.md
- `cancel_option_order_by_id` — Destructive — https://policylayer.com/tools/open-agent-tools-open-stocks-mcp/cancel-option-order-by-id.md
- `cancel_stock_order_by_id` — Destructive — https://policylayer.com/tools/open-agent-tools-open-stocks-mcp/cancel-stock-order-by-id.md
- `remove_from_watchlist` — Destructive — https://policylayer.com/tools/open-agent-tools-open-stocks-mcp/remove-from-watchlist.md
- `schwab_cancel_all_option_orders` — Destructive — https://policylayer.com/tools/open-agent-tools-open-stocks-mcp/schwab-cancel-all-option-orders.md
- `schwab_cancel_all_stock_orders` — Destructive — https://policylayer.com/tools/open-agent-tools-open-stocks-mcp/schwab-cancel-all-stock-orders.md
- `schwab_cancel_option_order` — Destructive — https://policylayer.com/tools/open-agent-tools-open-stocks-mcp/schwab-cancel-option-order.md
- `schwab_cancel_order` — Destructive — https://policylayer.com/tools/open-agent-tools-open-stocks-mcp/schwab-cancel-order.md
- `buy_option_limit` — Financial — https://policylayer.com/tools/open-agent-tools-open-stocks-mcp/buy-option-limit.md
- `buy_stock_limit` — Financial — https://policylayer.com/tools/open-agent-tools-open-stocks-mcp/buy-stock-limit.md
- `buy_stock_market` — Financial — https://policylayer.com/tools/open-agent-tools-open-stocks-mcp/buy-stock-market.md
- `option_credit_spread` — Financial — https://policylayer.com/tools/open-agent-tools-open-stocks-mcp/option-credit-spread.md
- `option_debit_spread` — Financial — https://policylayer.com/tools/open-agent-tools-open-stocks-mcp/option-debit-spread.md
- `schwab_buy_stock_limit` — Financial — https://policylayer.com/tools/open-agent-tools-open-stocks-mcp/schwab-buy-stock-limit.md
- `schwab_buy_stock_market` — Financial — https://policylayer.com/tools/open-agent-tools-open-stocks-mcp/schwab-buy-stock-market.md
- `schwab_option_buy_to_open` — Financial — https://policylayer.com/tools/open-agent-tools-open-stocks-mcp/schwab-option-buy-to-open.md
- `schwab_option_sell_to_close` — Financial — https://policylayer.com/tools/open-agent-tools-open-stocks-mcp/schwab-option-sell-to-close.md
- `schwab_order_buy_option_limit` — Financial — https://policylayer.com/tools/open-agent-tools-open-stocks-mcp/schwab-order-buy-option-limit.md
- `schwab_order_option_credit_spread` — Financial — https://policylayer.com/tools/open-agent-tools-open-stocks-mcp/schwab-order-option-credit-spread.md
- `schwab_order_option_debit_spread` — Financial — https://policylayer.com/tools/open-agent-tools-open-stocks-mcp/schwab-order-option-debit-spread.md
- `schwab_order_sell_option_limit` — Financial — https://policylayer.com/tools/open-agent-tools-open-stocks-mcp/schwab-order-sell-option-limit.md
- `schwab_order_sell_stop` — Financial — https://policylayer.com/tools/open-agent-tools-open-stocks-mcp/schwab-order-sell-stop.md
- `schwab_place_order` — Financial — https://policylayer.com/tools/open-agent-tools-open-stocks-mcp/schwab-place-order.md
- `schwab_replace_order` — Financial — https://policylayer.com/tools/open-agent-tools-open-stocks-mcp/schwab-replace-order.md
- `schwab_sell_stock_limit` — Financial — https://policylayer.com/tools/open-agent-tools-open-stocks-mcp/schwab-sell-stock-limit.md
- `schwab_sell_stock_market` — Financial — https://policylayer.com/tools/open-agent-tools-open-stocks-mcp/schwab-sell-stock-market.md
- `sell_option_limit` — Financial — https://policylayer.com/tools/open-agent-tools-open-stocks-mcp/sell-option-limit.md
- `sell_stock_limit` — Financial — https://policylayer.com/tools/open-agent-tools-open-stocks-mcp/sell-stock-limit.md
- `sell_stock_market` — Financial — https://policylayer.com/tools/open-agent-tools-open-stocks-mcp/sell-stock-market.md
- …and 121 more: https://policylayer.com/tools/open-agent-tools-open-stocks-mcp.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=open-agent-tools-open-stocks-mcp · API: https://policylayer.com/registry/api · Policy library: https://policylayer.com/policies/open-agent-tools-open-stocks-mcp