Get latest news headlines for financial markets with filtering options
AI agents call get_news_headlines to retrieve information from Unusual Whales MCP Server 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 with filtering capabilities. It performs data retrieval only—no creation, modification, deletion, or execution of operations. The function is informational and read-only, posing minimal risk even if called by an AI agent without restrictions. The 'filtering options' are query parameters for refining results, not operations that alter state.
From the tool's definition Tool name 'get_news_headlines' and description 'Get latest news headlines for financial markets with filtering options' indicate retrieval of publicly available news data with no side effects.
Attacks that exploit this kind of access
Get latest news headlines for financial markets with filtering options. It is categorised as a Read tool in the Unusual Whales MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Unusual Whales MCP Server 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 Unusual Whales MCP Server. Nothing to install.
get_news_headlines 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 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.
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.
get_news_headlines is provided by the Unusual Whales MCP Server MCP server (phields/unusualwhales-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
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