Get ERC20 approval events for a token or address
AI agents call get_approval_events 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 and queries blockchain event logs related to ERC20 token approvals. It has no side effects—it only fetches immutable historical data from the blockchain. Even though the server deals with financial assets (tokens), this specific tool does not move money, execute transactions, or perform any operations. It is purely informational analysis of past approval events.
From the tool's definition Tool name 'get_approval_events' and description 'Get ERC20 approval events for a token or address' indicate retrieval of historical approval events from blockchain state.
Documented attack patterns abuse exactly the kind of access get_approval_events 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_approval_events:
{
"version": "1",
"default": "deny",
"tools": {
"get_approval_events": {}
}
}get_approval_events 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 approval events for a token or address. 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_approval_events: 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_approval_events 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_approval_events 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_approval_events. 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_approval_events 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.
Free to start. No card required.
1240 BNB Chain MCP tools catalogued and risk-classified — across an index of 42,500+ MCP servers.