AI agents use request_small_balance_quote to commit financial operations through Bybit — usually the final step of a payment, billing, or trading workflow. A call moves real money.
This tool operates on a trading/exchange platform and requests a quote for converting cryptocurrency balances. Even though requesting a quote may seem like a read operation, in the context of Bybit's API this is typically the first step in a financial conversion transaction that commits to or initiates a financial operation.
From the tool's definition "Request a quote for converting small balance coins" — initiates a financial conversion/trade workflow on Bybit exchange
Attacks that exploit this kind of access
Request a quote for converting small balance coins. It is categorised as a Financial tool in the Bybit MCP Server, which means it involves financial transactions. Block by default and require explicit approval.
Register the Bybit MCP server in PolicyLayer and add a rule for request_small_balance_quote: 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 Bybit. Nothing to install.
request_small_balance_quote 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 request_small_balance_quote 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 request_small_balance_quote. 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.
request_small_balance_quote is provided by the Bybit MCP server (johnnywic/bybit-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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