AI agents call get_fund_custodial_sub_list to retrieve information from Bybit without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves a list of custodial sub-accounts. It performs a read-only query with no side effects—it does not create, modify, delete, or execute any actions. The 'get' prefix and description clearly indicate data retrieval. While it accesses account information on a financial exchange, the tool itself merely queries and returns data; it does not move money or commit financial obligations.
From the tool's definition Tool name 'get_fund_custodial_sub_list' contains 'get', indicating a retrieval operation. Description states 'Get fund custodial sub account list', which is a query operation that retrieves account information without modification.
Attacks that exploit this kind of access
Get fund custodial sub account list. It is categorised as a Read tool in the Bybit MCP Server, which means it retrieves data without modifying state.
Register the Bybit MCP server in PolicyLayer and add a rule for get_fund_custodial_sub_list: 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.
get_fund_custodial_sub_list 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 get_fund_custodial_sub_list 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 get_fund_custodial_sub_list. 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.
get_fund_custodial_sub_list 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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