Generate an income statement for the requested period (Income, Expenses, Net). Dates are ISO (YYYY-MM-DD).
AI agents call income_sheet to retrieve information from MCP Beancount Tool without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool generates a financial report by querying and aggregating existing accounting data. It does not create, modify, delete, or execute transactions—it only reads and displays information from the Beancount ledger in a structured format. While it pertains to financial data, it is a read-only reporting function, not a financial operation that moves money or creates obligations.
From the tool's definition Tool name 'income_sheet' and description 'Generate an income statement for the requested period (Income, Expenses, Net)' indicate data retrieval and reporting with no modifications to the ledger.
Attacks that exploit this kind of access
Generate an income statement for the requested period (Income, Expenses, Net). Dates are ISO (YYYY-MM-DD). It is categorised as a Read tool in the MCP Beancount Tool MCP Server, which means it retrieves data without modifying state.
Register the MCP Beancount Tool MCP server in PolicyLayer and add a rule for income_sheet: 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 Beancount Tool. Nothing to install.
income_sheet 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 income_sheet 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 income_sheet. 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.
income_sheet is provided by the MCP Beancount Tool MCP server (onesvat/mcp-beancount). 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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