# stocks_by_tag

Gets stocks filtered by market category tag.

Agent View of the PolicyLayer registry record for `stocks_by_tag`. HTML page: https://policylayer.com/tools/open-agent-tools-open-stocks-mcp/stocks-by-tag

## Facts

- Tool: `stocks_by_tag`
- 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": "stocks_by_tag",
    "arguments": {}
  }
}
```

## Why stocks_by_tag is rated Low

This tool retrieves or queries stock market data based on filtering criteria (category tags). It has no side effects—it does not create, modify, delete, or execute trades. The action is purely informational and read-only, making it a Read category tool with low severity risk.

From the tool's own definition: "Tool name 'stocks_by_tag' and description 'Gets stocks filtered by market category tag' indicate a query/retrieval operation with no modification or execution of trades."

## Use case

AI agents call stocks_by_tag 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": {
    "stocks_by_tag": {}
  }
}
```

## 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