market_news
Latest market headlines from MarketWatch (free, keyless). Returns {ok, topic, count, headlines:[{title,link,published,summary}]}.
This record as markdown: /tools/com-wingmanprotocol-agent-gateway/market-news.md
What market_news does on Gateway
AI agents call market_news to retrieve information from Gateway without modifying anything. It is typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
| Parameter | Type | Required | Description |
|---|---|---|---|
limit | integer | — | max headlines (default 15, max 40) |
topic | string | — | top|realtime|marketpulse|bulletins (default top) |
Parameters from the server's own tool schema.
Why market_news is rated Low
This is a simple data retrieval tool that queries and returns public market news from MarketWatch. It has no side effects, cannot modify data, execute code, delete information, or perform financial transactions. The keyless, free nature confirms it is a straightforward read-only information service. Minimal blast radius if misused by an agent — worst case is irrelevant news being retrieved.
From the tool's definition Tool returns market headlines with no modification capability; description explicitly shows read-only output structure {ok, topic, count, headlines:[...]} with no create/update/delete/execute parameters.
Attacks that exploit this kind of access
The rule that runs market_news safely
PolicyLayer is an MCP gateway: it sits between your AI agents and Gateway, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For market_news, this is the rule to start with:
market_news is read-only, so it stays allowed. Everything else on the server is denied unless you say otherwise.
The button opens the PolicyLayer dashboard: create your workspace, connect Gateway, apply this rule, and every market_news call is checked against it from then on.
Questions about market_news
Latest market headlines from MarketWatch (free, keyless). Returns {ok, topic, count, headlines:[{title,link,published,summary}]}. It is categorised as a Read tool in the Gateway MCP Server, which means it retrieves data without modifying state.
market_news accepts 2 parameters: limit, topic. The full parameter table on this page comes from the server's own tool schema.
Register the Gateway MCP server in PolicyLayer and add a rule for market_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 Gateway. Nothing to install.
market_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 market_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 market_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.
market_news is provided by the Gateway MCP server (https://wingmanprotocol.com/mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
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