AI agents call get_erc20_transfers to retrieve information from BNB Chain MCP without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves historical blockchain data (ERC20 transfer events) without modifying state, creating new transactions, or executing code. It is a standard blockchain data query with read-only semantics. Low severity because misuse would only expose existing historical data, not cause financial loss or state changes.
From the tool's definition Tool name 'get_erc20_transfers' and description 'Get ERC20 token transfer events' indicate data retrieval of blockchain transaction history. The verb 'Get' and noun 'events' characterize this as a query operation with no side effects.
Documented attack patterns abuse exactly the kind of access get_erc20_transfers gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and BNB Chain MCP, and nothing reaches the server without passing your rules. This is the rule we recommend for get_erc20_transfers:
{
"version": "1",
"default": "deny",
"tools": {
"get_erc20_transfers": {}
}
}get_erc20_transfers is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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Get ERC20 token transfer events. It is categorised as a Read tool in the BNB Chain MCP MCP Server, which means it retrieves data without modifying state.
Register the BNB Chain MCP server in PolicyLayer and add a rule for get_erc20_transfers: 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 BNB Chain MCP. Nothing to install.
get_erc20_transfers 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_erc20_transfers 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_erc20_transfers. 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_erc20_transfers is provided by the BNB Chain MCP server (nirholas/bnbchain-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 1240 BNB Chain MCP tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
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1240 BNB Chain MCP tools catalogued and risk-classified — across an index of 42,500+ MCP servers.