Check if markets are open
AI agents call get_market_status to retrieve information from Polygon 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 the current status of financial markets (open/closed state). It is a read-only query with no side effects, no code execution, no data modification, and no financial transactions. The blast radius of misuse is minimal—an agent could only retrieve status information, which is already public market data. This is a straightforward informational lookup classified as Read with low severity.
From the tool's definition Tool name 'get_market_status' and description 'Check if markets are open' indicate a query operation that retrieves market status information without modifying, executing, or deleting data.
Attacks that exploit this kind of access
Check if markets are open. It is categorised as a Read tool in the Polygon MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Polygon MCP Server MCP server in PolicyLayer and add a rule for get_market_status: 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 Polygon MCP Server. Nothing to install.
get_market_status 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_status 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_status. 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_status is provided by the Polygon MCP Server MCP server (jwaresolutions/polygon-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Every MCP server has a record like this.
Type a name, get the same breakdown: verified identity, auth posture, risk grade, capabilities, recommended policy.
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