get_forex_top_of_book

THE RISK

Low Risk

Why get_forex_top_of_book needs a policy

This tool retrieves financial market data (forex pricing information) without creating, modifying, deleting, or executing any operations. It is a straightforward read operation that queries the Tiingo API for current forex pricing data. The low severity reflects that misuse would only expose publicly available market data with no financial transaction capability or destructive potential.

From the tool's definition Tool description states 'Fetches real-time Forex Top-of-Book/Last data' - the verb 'Fetches' indicates data retrieval with no modification or side effects. This is a query operation that retrieves market data.

Documented attack patterns abuse exactly the kind of access get_forex_top_of_book gives an agent:

POLICY

How to control get_forex_top_of_book

PolicyLayer is an MCP gateway — it sits between your AI agents and MCP Tiingo Server, and nothing reaches the server without passing your rules. This is the rule we recommend for get_forex_top_of_book:

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "get_forex_top_of_book": {}
  }
}

get_forex_top_of_book is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.

Create a free account and register MCP Tiingo Server — nothing to install.
Add this policy — paste it, or build it visually.
Point your MCP client (Claude, Cursor, anything) at your gateway URL.

CAP THIS TOOL →

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EXPLORE

Related tools and policies

More MCP Tiingo Server tools

Read get_dividend_distributions Fetches historical dividend and distribution data for a given ticker. Read get_dividend_yield Fetches historical dividend yield data for a given ticker. Read get_end_of_day_prices Fetches End-of-Day prices for a given ticker symbol with optional date range and format. Read get_forex_prices Fetches historical intraday Forex prices for a given ticker symbol with optional date rang Read get_fundamentals_daily_metrics Fetches daily fundamental metrics for a given ticker. Read get_fundamentals_definitions Fetches available fundamental metrics and their definitions. Read get_fundamentals_meta Fetches fundamental meta data for companies. Read get_fundamentals_statements Fetches historical fundamental statement data (Balance Sheet, Income Statement, Cash Flow,

All 11 MCP Tiingo Server tools →

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Go deeper

The MCP Attack Database → Documented attack patterns against MCP deployments — and the policies that stop them.
Data exfiltration → How read access becomes an exfiltration channel when chained with untrusted content.
MCP token cost → What connecting this server costs in context-window tokens on every request.
Rate Limiting MCP Tool Calls: A Practical Guide →
MCP Security: Why Prompt Guardrails Aren't Enough →

FAQ

Questions about get_forex_top_of_book

What does the get_forex_top_of_book tool do? +

Fetches real-time Forex Top-of-Book/Last data for one or more ticker symbols. It is categorised as a Read tool in the MCP Tiingo Server MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on get_forex_top_of_book? +

Register the MCP Tiingo Server MCP server in PolicyLayer and add a rule for get_forex_top_of_book: allow, deny, rate-limit, or require approval. Point your MCP client at the PolicyLayer proxy URL and the rule is enforced on every call, before it reaches MCP Tiingo Server. Nothing to install.

What risk level is get_forex_top_of_book? +

get_forex_top_of_book is a Read tool with low risk. Read-only tools are generally safe to allow by default.

Can I rate-limit get_forex_top_of_book? +

Yes. Add a rate_limit block to the get_forex_top_of_book rule in your PolicyLayer policy. For example, setting max: 10 and window: 60 limits the tool to 10 calls per minute. Rate limits are tracked per agent session and reset automatically.

How do I block get_forex_top_of_book completely? +

Set action: deny in the PolicyLayer policy for get_forex_top_of_book. The AI agent will receive a policy violation error and cannot call the tool. You can also include a reason field to explain why the tool is blocked.

What MCP server provides get_forex_top_of_book? +

get_forex_top_of_book is provided by the MCP Tiingo Server MCP server (matteoantoci/mcp-tiingo). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every MCP Tiingo Server tool call.

Start from MCP Tiingo Server, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.

CHECK YOUR STACK →