Retrieve balances globally or for a specific pool (requires Advanced tutor role)
AI agents call getBalances to retrieve information from 42 MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves balance information without creating, modifying, or deleting data. While 'balances' could relate to financial accounts, the tool only reads data and does not move money, commit financial obligations, or execute transactions.
From the tool's definition Tool name 'getBalances' and description 'Retrieve balances' indicate data retrieval with no modification. The Advanced tutor role requirement suggests access control on sensitive financial data.
Attacks that exploit this kind of access
Retrieve balances globally or for a specific pool (requires Advanced tutor role). It is categorised as a Read tool in the 42 MCP Server MCP Server, which means it retrieves data without modifying state.
Register the 42 MCP Server MCP server in PolicyLayer and add a rule for getBalances: 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 42 MCP Server. Nothing to install.
getBalances 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 getBalances 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 getBalances. 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.
getBalances is provided by the 42 MCP Server MCP server (smizuoch/42-mcp-server). 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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