List and filter Polymarket prediction markets. Defaults to active, non-closed markets sorted by volume descending. Supports rich filtering by volume, liquidity, dates, tags, and status.
AI agents call get_markets to retrieve information from Polymarket 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 market data with no side effects. It performs filtering and sorting on existing data but does not create, modify, delete, execute code, or trigger financial transactions. The 'get_' prefix and 'list and filter' language confirm pure data retrieval. Severity is low because accessing public prediction market data poses minimal risk even if misused by an AI agent.
From the tool's definition Tool name is 'get_markets' and description states it 'List and filter Polymarket prediction markets' with filtering capabilities.
Attacks that exploit this kind of access
List and filter Polymarket prediction markets. Defaults to active, non-closed markets sorted by volume descending. Supports rich filtering by volume, liquidity, dates, tags, and status. It is categorised as a Read tool in the Polymarket MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Polymarket MCP Server MCP server in PolicyLayer and add a rule for get_markets: 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 Polymarket MCP Server. Nothing to install.
get_markets 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_markets 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_markets. 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_markets is provided by the Polymarket MCP Server MCP server (yigitabi5444/yigit_polymarket_mcp). 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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