# add_to_watchlist

Add a security to a watchlist.

Agent View of the PolicyLayer registry record for `add_to_watchlist`. HTML page: https://policylayer.com/tools/robinhood-agentic-trading/add-to-watchlist

## Facts

- Tool: `add_to_watchlist`
- Server: Robinhood Agentic Trading (`https://agent.robinhood.com/mcp/trading`) — https://policylayer.com/tools/robinhood-agentic-trading.md
- Homepage: https://github.com/https://agent.robinhood.com/mcp/trading
- Risk category: Write (Medium risk)
- Registry record: grade D, identity verified
- Server auth posture: gated
- Server CORS policy: *
- Server rate-limited: no
- Parameters: 2 (1 required)
- Recommended policy verdict: Rate-limited

## Parameters

| Parameter | Type | Required | Description |
| --- | --- | --- | --- |
| `symbol` | string | yes |  |
| `watchlist` | string | no |  |

Parameters from the server's own tool schema.

## Example call (MCP tools/call, JSON-RPC 2.0)

```json
{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "tools/call",
  "params": {
    "name": "add_to_watchlist",
    "arguments": {
      "symbol": "<symbol>"
    }
  }
}
```

## Why add_to_watchlist is rated Medium

The add_to_watchlist tool modifies watchlist data by adding a security, fitting the Write category. While the Robinhood server as a whole involves financial trading operations (including place_equity_order which is Execute), this specific tool merely organizes user data without executing trades, moving money, or creating financial obligations.

From the tool's own definition: "Tool description states 'Add a security to a watchlist,' which creates or modifies a watchlist entry. This is a reversible write operation (securities can be removed from watchlists)."

Risk signals: Modifies account watchlists

## Use case

AI agents use add_to_watchlist to create or update resources in Robinhood Agentic Trading, usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Robinhood Agentic Trading environment.

## Recommended policy (PolicyLayer)

Verdict: **Rate-limited**. Enforced by the PolicyLayer MCP gateway (https://policylayer.com/mcp-gateway) before a call reaches Robinhood Agentic Trading:

```json
{
  "version": "1",
  "default": "deny",
  "tools": {
    "add_to_watchlist": {
      "limits": [
        {
          "counter": "add_to_watchlist_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}
```

## Other tools on Robinhood Agentic Trading (11)

- `cancel_equity_order` — Destructive — https://policylayer.com/tools/robinhood-agentic-trading/cancel-equity-order.md
- `place_equity_order` — Financial — https://policylayer.com/tools/robinhood-agentic-trading/place-equity-order.md
- `get_accounts` — Read — https://policylayer.com/tools/robinhood-agentic-trading/get-accounts.md
- `get_equity_orders` — Read — https://policylayer.com/tools/robinhood-agentic-trading/get-equity-orders.md
- `get_equity_positions` — Read — https://policylayer.com/tools/robinhood-agentic-trading/get-equity-positions.md
- `get_equity_quotes` — Read — https://policylayer.com/tools/robinhood-agentic-trading/get-equity-quotes.md
- `get_portfolio` — Read — https://policylayer.com/tools/robinhood-agentic-trading/get-portfolio.md
- `get_watchlists` — Read — https://policylayer.com/tools/robinhood-agentic-trading/get-watchlists.md
- `review_equity_order` — Read — https://policylayer.com/tools/robinhood-agentic-trading/review-equity-order.md
- `search` — Read — https://policylayer.com/tools/robinhood-agentic-trading/search.md
- `update_watchlist` — Write — https://policylayer.com/tools/robinhood-agentic-trading/update-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=robinhood-agentic-trading · API: https://policylayer.com/registry/api · Policy library: https://policylayer.com/policies/robinhood-agentic-trading