Fetch recent financial news headlines for a stock from RSS feeds.
AI agents call fetch_ticker_news to retrieve information from Momentum without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves and queries financial news headlines from RSS feeds—a read-only operation with no side effects. It does not modify data, execute trades, move funds, or trigger external operations. The context of a trading analysis server does not elevate the risk category; news aggregation itself is informational only.
From the tool's definition Tool name 'fetch_ticker_news' and description 'Fetch recent financial news headlines for a stock from RSS feeds' indicate retrieval of publicly available news data with no modification, creation, deletion, or execution of trades/commands.
Documented attack patterns abuse exactly the kind of access fetch_ticker_news gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Momentum, and nothing reaches the server without passing your rules. This is the rule we recommend for fetch_ticker_news:
{
"version": "1",
"default": "deny",
"tools": {
"fetch_ticker_news": {}
}
}fetch_ticker_news is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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Fetch recent financial news headlines for a stock from RSS feeds. It is categorised as a Read tool in the Momentum MCP Server, which means it retrieves data without modifying state.
Register the Momentum MCP server in PolicyLayer and add a rule for fetch_ticker_news: 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 Momentum. Nothing to install.
fetch_ticker_news is a Read tool with low risk. Read-only tools are generally safe to allow by default.
Yes. Add a rate_limit block to the fetch_ticker_news 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.
Set action: deny in the PolicyLayer policy for fetch_ticker_news. 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.
fetch_ticker_news is provided by the Momentum MCP server (mphinance/momentum-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from Momentum, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
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