Buy from private market order book + AMM in one transaction.
AI agents use pm_buy_orders_and_contract to commit financial operations through Basis MCP Server — usually the final step of a payment, billing, or trading workflow. A call moves real money.
This tool executes financial transactions by purchasing tokens/assets from a private market order book and an AMM (Automated Market Maker) simultaneously. This directly moves funds/crypto assets, making it a Financial category tool. The blast radius is critical because an AI agent misusing this tool could drain user funds through unintended purchases on a DeFi protocol on BNB Smart Chain.
From the tool's definition 'Buy from private market order book + AMM in one transaction' — involves purchasing assets via both order book and AMM, committing financial value in a blockchain transaction
Attacks that exploit this kind of access
Buy from private market order book + AMM in one transaction. It is categorised as a Financial tool in the Basis MCP Server MCP Server, which means it involves financial transactions. Block by default and require explicit approval.
Register the Basis MCP Server MCP server in PolicyLayer and add a rule for pm_buy_orders_and_contract: 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 Basis MCP Server. Nothing to install.
pm_buy_orders_and_contract 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 pm_buy_orders_and_contract 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 pm_buy_orders_and_contract. 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.
pm_buy_orders_and_contract is provided by the Basis MCP Server MCP server (launch-on-basis/mcp-ts). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
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