Get balance breakdown per mint
AI agents call get_mint_balances to retrieve information from MCP Money without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves or queries financial balance data across different mints. While it relates to a financial system, it performs no financial transactions, fund transfers, or account modifications. It is a read-only operation that returns information about existing balances, making it a Read category risk rather than Financial (which requires actual money movement).
From the tool's definition Tool name 'get_mint_balances' and description 'Get balance breakdown per mint' indicate a query operation that retrieves balance information without modifying data or executing external operations.
Documented attack patterns abuse exactly the kind of access get_mint_balances gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and MCP Money, and nothing reaches the server without passing your rules. This is the rule we recommend for get_mint_balances:
{
"version": "1",
"default": "deny",
"tools": {
"get_mint_balances": {}
}
}get_mint_balances is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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Get balance breakdown per mint. It is categorised as a Read tool in the MCP Money MCP Server, which means it retrieves data without modifying state.
Register the MCP Money MCP server in PolicyLayer and add a rule for get_mint_balances: 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 MCP Money. Nothing to install.
get_mint_balances 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_mint_balances 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_mint_balances. 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_mint_balances is provided by the MCP Money MCP server (pablof7z/mcp-money). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from MCP Money, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
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6 MCP Money tools catalogued and risk-classified — across an index of 43,000+ MCP servers.