Adjust position to target size or close position entirely.
AI agents use rebalance_position to commit financial operations through Polymarket MCP Server — usually the final step of a payment, billing, or trading workflow. A call moves real money.
This tool directly manipulates financial positions on a prediction market platform, either buying or selling contracts to reach a target size or fully exiting a position. This constitutes a financial transaction with real monetary consequences. The severity is critical because an AI agent misusing this tool could execute large unintended trades, liquidate positions prematurely, or cause significant financial loss.
From the tool's definition 'Adjust position to target size or close position entirely' on a platform described as enabling autonomous trading and managing positions on Polymarket prediction markets
Attacks that exploit this kind of access
Adjust position to target size or close position entirely. It is categorised as a Financial tool in the Polymarket MCP Server MCP Server, which means it involves financial transactions. Block by default and require explicit approval.
Register the Polymarket MCP Server MCP server in PolicyLayer and add a rule for rebalance_position: 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.
rebalance_position is a Financial tool with critical risk. Critical-risk tools should be blocked by default and only enabled with explicit human approval.
Yes. Add a rate_limit block to the rebalance_position 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 rebalance_position. 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.
rebalance_position 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.
Teams ship this data inside their own products. See what a licence covers →