AI agents call stock_merito_data to retrieve information from Stock Info Service without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool appears to retrieve stock merit/quality data without side effects. The empty description reduces confidence slightly, but the consistent pattern of sibling read-only tools and the informational nature of a stock data service strongly indicate a Read classification. There is no evidence of write, execution, deletion, or financial transaction capabilities.
From the tool's definition Tool name 'stock_merito_data' combined with sibling tools that are all data retrieval functions (get_finance_news, get_stock_info, get_stock_news, get_stock_price_monthly, stock_individual_basic_info).
Documented attack patterns abuse exactly the kind of access stock_merito_data gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Stock Info Service, and nothing reaches the server without passing your rules. This is the rule we recommend for stock_merito_data:
{
"version": "1",
"default": "deny",
"tools": {
"stock_merito_data": {}
}
}stock_merito_data is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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stock_merito_data. It is categorised as a Read tool in the Stock Info Service MCP Server, which means it retrieves data without modifying state.
Register the Stock Info Service MCP server in PolicyLayer and add a rule for stock_merito_data: 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 Stock Info Service. Nothing to install.
stock_merito_data 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 stock_merito_data 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 stock_merito_data. 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.
stock_merito_data is provided by the Stock Info Service MCP server (tddt/stock_info_mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from Stock Info Service, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
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7 Stock Info Service tools catalogued and risk-classified — across an index of 43,000+ MCP servers.