Close all active WebSocket connections and clean up resources.
AI agents call cleanup_all_streams to retrieve information from Binance MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool performs cleanup and resource management of WebSocket connections, which is a housekeeping operation with no side effects on data, financial state, or external systems. It terminates connections that the agent itself initiated, comparable to closing a file handle or disconnecting from a service.
From the tool's definition Tool name 'cleanup_all_streams' and description 'Close all active WebSocket connections and clean up resources' indicate resource management/lifecycle operations. No data retrieval, modification, deletion, code execution, or financial transaction occurs.
Documented attack patterns abuse exactly the kind of access cleanup_all_streams gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Binance MCP Server, and nothing reaches the server without passing your rules. This is the rule we recommend for cleanup_all_streams:
{
"version": "1",
"default": "deny",
"tools": {
"cleanup_all_streams": {}
}
}cleanup_all_streams is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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Close all active WebSocket connections and clean up resources. It is categorised as a Read tool in the Binance MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Binance MCP Server MCP server in PolicyLayer and add a rule for cleanup_all_streams: 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 Binance MCP Server. Nothing to install.
cleanup_all_streams 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 cleanup_all_streams 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 cleanup_all_streams. 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.
cleanup_all_streams is provided by the Binance MCP Server MCP server (tienan92it/binance-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from Binance MCP Server, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
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29 Binance MCP Server tools catalogued and risk-classified — across an index of 43,000+ MCP servers.