Get supported RPC methods for a specific blockchain chain
AI agents call gateway_get_supported_methods 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 metadata about supported RPC methods on a blockchain. It is a read-only operation with no side effects, no code execution, no data modification, and no financial impact. The query returns informational data to help understand blockchain capabilities. Severity is low as misuse would only return misleading or redundant information.
From the tool's definition 'Get supported RPC methods for a specific blockchain chain' - a query operation that retrieves information about available RPC methods without modifying state or triggering external operations.
Documented attack patterns abuse exactly the kind of access gateway_get_supported_methods 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 gateway_get_supported_methods:
{
"version": "1",
"default": "deny",
"tools": {
"gateway_get_supported_methods": {}
}
}gateway_get_supported_methods is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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Get supported RPC methods for a specific blockchain chain. 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 gateway_get_supported_methods: 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.
gateway_get_supported_methods 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 gateway_get_supported_methods 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 gateway_get_supported_methods. 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.
gateway_get_supported_methods 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.