AI agents call decode_uint64 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 a purely computational operation—converting bytes to an unsigned 64-bit integer. It retrieves no data, modifies nothing, executes no code on external systems, and has no destructive or financial implications. It is a basic data parsing utility suitable for Read category.
From the tool's definition Tool name 'decode_uint64' and description 'Decode bytes to a uint64' indicate a data transformation/parsing operation with no side effects. The verb 'decode' is read-only.
Documented attack patterns abuse exactly the kind of access decode_uint64 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 decode_uint64:
{
"version": "1",
"default": "deny",
"tools": {
"decode_uint64": {}
}
}decode_uint64 is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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Decode bytes to a uint64. 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 decode_uint64: 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.
decode_uint64 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 decode_uint64 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 decode_uint64. 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.
decode_uint64 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.