Subscribe to real-time updates for user
AI agents call subscribe_user_trades 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 or observes real-time trade information without creating, modifying, deleting, or executing any trades. It is a read-only subscription to a data feed. Despite being on a financial trading platform, the tool itself performs no financial transactions—it only monitors/queries existing trade activity. Therefore, it belongs in the Read category with low severity.
From the tool's definition Tool name 'subscribe_user_trades' with description 'Subscribe to real-time updates for user' indicates passive monitoring/subscription to data streams.
Attacks that exploit this kind of access
Subscribe to real-time updates for user. 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 subscribe_user_trades: 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.
subscribe_user_trades 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 subscribe_user_trades 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 subscribe_user_trades. 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.
subscribe_user_trades is provided by the Polymarket MCP Server MCP server (nancheng582-jpg/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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