Get balance for an account as of a given date.
AI agents call get_account_balance to retrieve information from Finance App without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool queries and retrieves financial data (account balance) without side effects. It performs a read-only operation on the accounting database. While the sibling tools include destructive operations (delete_budget, delete_transaction) and write operations (create_account, create_budget), this specific tool is purely informational.
From the tool's definition Tool name 'get_account_balance' and description 'Get balance for an account as of a given date' indicate a retrieval operation with no data modification, creation, deletion, or execution of external operations.
Attacks that exploit this kind of access
Get balance for an account as of a given date. It is categorised as a Read tool in the Finance App MCP Server, which means it retrieves data without modifying state.
Register the Finance App MCP server in PolicyLayer and add a rule for get_account_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 Finance App. Nothing to install.
get_account_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_account_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_account_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_account_balance is provided by the Finance App MCP server (youssefaltai/finance-app). 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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