log_expense
Log a business expense for tax deductions and P&L tracking. Categories: hosting, software, domains, insurance, ai_api, payment_processing, legal, equipment, travel, marketing, subcontractor, other.
This record as markdown: /tools/app-businys-mcp-server/log-expense.md
What log_expense does on Businys
AI agents use log_expense to create or update resources in Businys, usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Businys environment.
Why log_expense is rated Medium
This tool writes a new financial record (expense entry) to the system for accounting purposes. It does not move money or commit financial obligations directly; it merely records an expense that has already occurred. It is reversible in principle (the record can be deleted/corrected), placing it in Write rather than Financial or Destructive.
From the tool's definition 'Log a business expense for tax deductions and P&L tracking' — creates a new expense record in the system
Attacks that exploit this kind of access
The rule that runs log_expense 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 log_expense, this is the rule to start with:
log_expense 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.
The button opens the PolicyLayer dashboard: create your workspace, connect Businys, apply this rule, and every log_expense call is checked against it from then on.
Questions about log_expense
Log a business expense for tax deductions and P&L tracking. Categories: hosting, software, domains, insurance, ai_api, payment_processing, legal, equipment, travel, marketing, subcontractor, other. It is categorised as a Write tool in the Businys MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
Register the Businys MCP server in PolicyLayer and add a rule for log_expense: 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.
log_expense is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.
Yes. Add a rate_limit block to the log_expense 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 log_expense. 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.
log_expense 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.
More on Businys, and thousands of servers like it.
This server
Across the catalogue