Check token approvals for a wallet and identify risky unlimited approvals
AI agents call check_approval_risks 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 performs inspection and analysis of wallet token approvals (a read operation) to identify potential security risks. It does not create, modify, delete, or execute any transactions. The tool provides informational output to help users understand their wallet's approval state, making it a pure Read operation with low severity since it has no side effects on blockchain state or user assets.
From the tool's definition Tool name is 'check_approval_risks' and description states it 'Check token approvals for a wallet and identify risky unlimited approvals' — the core function is to retrieve and analyze existing approval data, with no capability to modify or execute…
Documented attack patterns abuse exactly the kind of access check_approval_risks 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 check_approval_risks:
{
"version": "1",
"default": "deny",
"tools": {
"check_approval_risks": {}
}
}check_approval_risks is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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Check token approvals for a wallet and identify risky unlimited approvals. 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 check_approval_risks: 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.
check_approval_risks 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 check_approval_risks 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 check_approval_risks. 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.
check_approval_risks 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.