get_news_headlines

THE RISK

Low Risk

Why get_news_headlines needs a policy

This tool retrieves publicly available news data without side effects. It is a pure read operation that queries and returns financial news headlines. The mention of 'source attribution and duplicate detection' confirms it is a passive data retrieval mechanism with no capability to modify, delete, or execute actions.

From the tool's definition Tool name 'get_news_headlines' and description 'Get recent news headlines with source attribution and duplicate detection' indicate data retrieval only. No modifications, deletions, code execution, or financial transactions are performed.

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

POLICY

How to control get_news_headlines

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

policy.json

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

get_news_headlines 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 IsoFinancial-MCP — 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 →

Free to start. No card required.

EXPLORE

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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_news_headlines

What does the get_news_headlines tool do? +

Get recent news headlines with source attribution and duplicate detection. It is categorised as a Read tool in the IsoFinancial-MCP MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on get_news_headlines? +

Register the IsoFinancial- MCP server in PolicyLayer and add a rule for get_news_headlines: 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 IsoFinancial-MCP. Nothing to install.

What risk level is get_news_headlines? +

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

Can I rate-limit get_news_headlines? +

Yes. Add a rate_limit block to the get_news_headlines 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_news_headlines completely? +

Set action: deny in the PolicyLayer policy for get_news_headlines. 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_news_headlines? +

get_news_headlines is provided by the IsoFinancial- MCP server (niels-8/isofinancial-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every IsoFinancial-MCP tool call.

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

CHECK YOUR STACK →