Polymarket whale radar: the largest recent trades by USD notional across all markets, ranked. Optional minUsd floor and limit. Each entry includes wallet, trader name, market, side, outcome, size, price, USD value, and tx hash — for tracking smart-money / large positioning. Read-only from Polymar...
AI agents call predict.whales to retrieve information from Mcp without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool queries and retrieves historical trading data from Polymarket without modifying data, executing code, or moving funds. It enables monitoring of large trades but has no side effects on the blockchain or trading system. The read-only designation and data retrieval nature classify it as Read category with low severity since misuse would only expose information already publicly visible.
From the tool's definition Tool description explicitly states 'Read-only from Polymarket' and retrieves 'largest recent trades' data including wallet, trader name, market, side, outcome, size, price, USD value, and tx hash.
Attacks that exploit this kind of access
Polymarket whale radar: the largest recent trades by USD notional across all markets, ranked. Optional minUsd floor and limit. Each entry includes wallet, trader name, market, side, outcome, size, price, USD value, and tx hash — for tracking smart-money / large positioning. Read-only from Polymarket\. It is categorised as a Read tool in the Mcp MCP Server, which means it retrieves data without modifying state.
Register the MCP server in PolicyLayer and add a rule for predict.whales: 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 Mcp. Nothing to install.
predict.whales 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 predict.whales 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 predict.whales. 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.
predict.whales is provided by the MCP server (@2sio/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.
Teams ship this data inside their own products. See what a licence covers →