# margin_interest

Gets margin interest charges and rates.

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

## Facts

- Tool: `margin_interest`
- 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_interest",
    "arguments": {}
  }
}
```

## Why margin_interest is rated Low

This tool retrieves financial data (margin interest charges and rates) but does not modify account state, execute trades, move money, or delete data. It is purely informational, analogous to querying account details or viewing portfolio information. While the data is finance-related, the tool itself performs no financial transaction or obligation.

From the tool's own definition: "Tool name 'margin_interest' and description 'Gets margin interest charges and rates' indicate a retrieval operation with no side effects. The verb 'Gets' explicitly denotes a query action."

## Use case

AI agents call margin_interest 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_interest": {}
  }
}
```

## 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