List prediction markets. Filter by status: 0=CREATED, 1=ACTIVE, 2=RESOLUTION_PENDING, 3=RESOLUTION_PROPOSED, 4=CANCELLED, 5=RESOLVED, 6=DISPUTED
AI agents call list_markets to retrieve information from Question Market 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 filtering capabilities, which is a read-only operation with no side effects. It enables browsing of markets but does not execute trades, create accounts, or move funds. The low severity reflects that misuse would only expose informational data about markets.
From the tool's definition Tool name is 'list_markets' and description states 'List prediction markets' with filtering options. No creation, modification, deletion, or financial transaction occurs.
Attacks that exploit this kind of access
List prediction markets. Filter by status: 0=CREATED, 1=ACTIVE, 2=RESOLUTION_PENDING, 3=RESOLUTION_PROPOSED, 4=CANCELLED, 5=RESOLVED, 6=DISPUTED. It is categorised as a Read tool in the Question Market MCP Server, which means it retrieves data without modifying state.
Register the Question Market MCP server in PolicyLayer and add a rule for list_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 Question Market. Nothing to install.
list_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 list_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 list_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.
list_markets is provided by the Question Market MCP server (qmrkt/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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