AI agents call listSubscriptions to retrieve information from Bybit MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves and queries the state of active WebSocket subscriptions without modifying any data, executing trades, deleting resources, or committing financial transactions. It is purely informational for debugging and monitoring purposes, making it a Read operation with low severity.
From the tool's definition Tool name is 'listSubscriptions' and description states it 'lists all current active subscriptions and their status and buffered message count' (translated from Chinese: 列出当前所有活跃订阅及其状态和缓冲消息数). The explicit use case is 'for debugging and monitoring' (用于调试和监控).
Documented attack patterns abuse exactly the kind of access listSubscriptions gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Bybit MCP Server, and nothing reaches the server without passing your rules. This is the rule we recommend for listSubscriptions:
{
"version": "1",
"default": "deny",
"tools": {
"listSubscriptions": {}
}
}listSubscriptions is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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列出当前所有活跃订阅及其状态和缓冲消息数。用于调试和监控。. It is categorised as a Read tool in the Bybit MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Bybit MCP Server MCP server in PolicyLayer and add a rule for listSubscriptions: 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 MCP Server. Nothing to install.
listSubscriptions 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 listSubscriptions 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 listSubscriptions. 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.
listSubscriptions is provided by the Bybit MCP Server MCP server (bybit-exchange/trading-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from Bybit MCP Server, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
Free to start. No card required.
326 Bybit MCP Server tools catalogued and risk-classified — across an index of 43,000+ MCP servers.