AI agents call get_nonce to retrieve information from Waiaas without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
Nonce retrieval is a fundamental read operation in blockchain contexts—it queries transaction state without modifying it. Even in a wallet context, reading nonce values is necessary for constructing transactions but does not itself execute transfers, approve actions, or commit financial transactions. The empty description lowers confidence slightly, but the function name strongly indicates a harmless read operation.
From the tool's definition Tool name 'get_nonce' suggests retrieval of a nonce value (a cryptographic counter used in blockchain transactions). The empty description prevents definitive classification, but nonce retrieval is a read-only operation with no side effects.
Documented attack patterns abuse exactly the kind of access get_nonce gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Waiaas, and nothing reaches the server without passing your rules. This is the rule we recommend for get_nonce:
{
"version": "1",
"default": "deny",
"tools": {
"get_nonce": {}
}
}get_nonce is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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get_nonce. It is categorised as a Read tool in the Waiaas MCP Server, which means it retrieves data without modifying state.
Register the Waiaas MCP server in PolicyLayer and add a rule for get_nonce: 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 Waiaas. Nothing to install.
get_nonce 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_nonce 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_nonce. 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_nonce is provided by the Waiaas MCP server (minhoyoo-iotrust/waiaas). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from Waiaas, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
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126 Waiaas tools catalogued and risk-classified — across an index of 43,000+ MCP servers.