list_expenses

List business expenses with optional category filter and period. Includes summary totals, deductible amounts, and breakdown by category.

SERVERBusinys SOURCE@businys/mcp-server

Low RISK CLASS

Category Read

Parameters 00 required

Recommended Allowedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/app-businys-mcp-server/list-expenses.md

WHAT IT DOES

What list_expenses does on Businys

AI agents call list_expenses to retrieve information from Businys without modifying anything. It is typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.

RISK

Why list_expenses is rated Low

This tool retrieves and queries existing expense data with optional filters (category, period) and presents summaries. It performs no modifications, deletions, or external operations. The output is informational only, making it a standard Read operation with low severity since misuse would only expose financial data visibility, not alter or delete records.

From the tool's definition Tool name is 'list_expenses' and description states it 'List[s] business expenses' with filtering and summary—purely retrieval operations with 'no side effects' characteristic of Read category.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs list_expenses safely

PolicyLayer is an MCP gateway: it sits between your AI agents and Businys, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For list_expenses, this is the rule to start with:

list_expenses Allowed

list_expenses is read-only, so it stays allowed. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "list_expenses": {}
  }
}

ALLOW ONLY THIS TOOL → Instant setup, no code required.

The button opens the PolicyLayer dashboard: create your workspace, connect Businys, apply this rule, and every list_expenses call is checked against it from then on.

FAQ

Questions about list_expenses

What does the list_expenses tool do? +

List business expenses with optional category filter and period. Includes summary totals, deductible amounts, and breakdown by category. It is categorised as a Read tool in the Businys MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on list_expenses? +

Register the Businys MCP server in PolicyLayer and add a rule for list_expenses: 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 Businys. Nothing to install.

What risk level is list_expenses? +

list_expenses is a Read tool with low risk. Read-only tools are generally safe to allow by default.

Can I rate-limit list_expenses? +

Yes. Add a rate_limit block to the list_expenses 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 list_expenses completely? +

Set action: deny in the PolicyLayer policy for list_expenses. 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 list_expenses? +

list_expenses is provided by the Businys MCP server (@businys/mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

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