cash_flow_statement · Excel Finance MCP: Risk & Policy

WHAT IT DOES

What cash_flow_statement does on Excel Finance MCP

AI agents use cash_flow_statement to create or update resources in Excel Finance MCP — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Excel Finance MCP environment.

WHY IT NEEDS A POLICY

Why cash_flow_statement needs a policy

The tool creates/generates financial documentation (cash flow statement) which modifies data in a workbook reversibly. While it involves financial data, it does not move money, execute arbitrary code, or destroy data—it produces analytical output. Categorized as Write rather than Financial because it generates reports rather than transacting funds.

From the tool's definition Tool generates and creates a cash flow statement (a financial document), which is a reversible write operation. Server description emphasizes "creating Excel workbooks with advanced financial formulas, cash flow projections, and automated financial reporting."

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

cash_flow_statement Rate-limited

cash_flow_statement stays usable, but capped — an agent stuck in a loop can't make hundreds of changes a minute. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "cash_flow_statement": {
      "limits": [
        {
          "counter": "cash_flow_statement_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

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Instant setup, no code required.

PolicyLayer is an MCP gateway: every tool call is checked against your rule before it reaches Excel Finance MCP, so you can run agents against it safely.

FAQ

Questions about cash_flow_statement

What does the cash_flow_statement tool do? +

Generate cash flow statement for specified period. It is categorised as a Write tool in the Excel Finance MCP MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on cash_flow_statement? +

Register the Excel Finance MCP server in PolicyLayer and add a rule for cash_flow_statement: 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 Excel Finance MCP. Nothing to install.

What risk level is cash_flow_statement? +

cash_flow_statement is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.

Can I rate-limit cash_flow_statement? +

Yes. Add a rate_limit block to the cash_flow_statement 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.

How do I block cash_flow_statement completely? +

Set action: deny in the PolicyLayer policy for cash_flow_statement. 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.

What MCP server provides cash_flow_statement? +

cash_flow_statement is provided by the Excel Finance MCP server (jeremycharlesgillespie/excel-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.