Get the balance of a Nimiq account
AI agents call get_nimiq_balance to retrieve information from Nimiq MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool queries blockchain data (account balance) with no side effects, no state modification, and no ability to move funds or trigger external actions. It is a straightforward read operation analogous to checking an account balance in a ledger, which poses minimal security risk when misused by an AI agent.
From the tool's definition Tool name 'get_nimiq_balance' and description 'Get the balance of a Nimiq account' indicate a query operation that retrieves account balance data without modifying state or executing external operations.
Attacks that exploit this kind of access
Get the balance of a Nimiq account. It is categorised as a Read tool in the Nimiq MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Nimiq MCP Server MCP server in PolicyLayer and add a rule for get_nimiq_balance: 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 Nimiq MCP Server. Nothing to install.
get_nimiq_balance 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_nimiq_balance 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_nimiq_balance. 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_nimiq_balance is provided by the Nimiq MCP Server MCP server (onmax/nimiq-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Every MCP server has a record like this.
Type a name, get the same breakdown: verified identity, auth posture, risk grade, capabilities, recommended policy.
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