AI agents call get_market_index_info to retrieve information from CasualMarket without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves market index information without modifying, executing, or deleting anything. It fits the Read category (retrieves or queries data with no side effects). Severity is low because misuse would only expose or retrieve existing market data, not execute trades, delete data, or move money.
From the tool's definition Tool name 'get_market_index_info' indicates retrieval of market index information. The server context describes tools for 'real-time stock prices, financial analysis, market information' with sibling tools like 'get_company_profile',…
Documented attack patterns abuse exactly the kind of access get_market_index_info gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and CasualMarket, and nothing reaches the server without passing your rules. This is the rule we recommend for get_market_index_info:
{
"version": "1",
"default": "deny",
"tools": {
"get_market_index_info": {}
}
}get_market_index_info is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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get_market_index_info. It is categorised as a Read tool in the CasualMarket MCP Server, which means it retrieves data without modifying state.
Register the CasualMarket MCP server in PolicyLayer and add a rule for get_market_index_info: 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 CasualMarket. Nothing to install.
get_market_index_info 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_market_index_info 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_market_index_info. 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_market_index_info is provided by the CasualMarket MCP server (sacahan/casualmarket). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from CasualMarket, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
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23 CasualMarket tools catalogued and risk-classified — across an index of 43,000+ MCP servers.