This record as markdown: /tools/io-tinyfn-tinyfn/break-even.md
What break_even does on TinyFn
AI agents call break_even to retrieve information from TinyFn without modifying anything. It is typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
| Parameter | Type | Required | Description |
|---|---|---|---|
fixed_costs | number | Yes | Fixed costs |
cost_per_unit | number | Yes | Variable cost per unit |
price_per_unit | number | Yes | Price per unit |
Parameters from the server's own tool schema.
Why break_even is rated Low
This tool performs deterministic mathematical analysis (break-even point calculation) based on input parameters. It retrieves or computes data without modifying persistent state, executing code, deleting data, or moving money. It fits the Read category as a computational query tool. Severity is low because misuse would only produce incorrect calculations, not enable data loss, system compromise, or financial harm.
From the tool's definition Tool name 'break_even' and description 'Calculate break-even point' indicate a pure calculation/query operation with no data modification, deletion, or external side effects.
Attacks that exploit this kind of access
The rule that runs break_even safely
PolicyLayer is an MCP gateway: it sits between your AI agents and TinyFn, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For break_even, this is the rule to start with:
break_even is read-only, so it stays allowed. Everything else on the server is denied unless you say otherwise.
The button opens the PolicyLayer dashboard: create your workspace, connect TinyFn, apply this rule, and every break_even call is checked against it from then on.
Questions about break_even
Calculate break-even point. It is categorised as a Read tool in the TinyFn MCP Server, which means it retrieves data without modifying state.
break_even accepts 3 parameters: fixed_costs, cost_per_unit, price_per_unit. Required: fixed_costs, cost_per_unit, price_per_unit. The full parameter table on this page comes from the server's own tool schema.
Register the TinyFn MCP server in PolicyLayer and add a rule for break_even: 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 TinyFn. Nothing to install.
break_even 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 break_even 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 break_even. 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.
break_even is provided by the TinyFn MCP server (https://api.tinyfn.io/mcp/all/). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
More on TinyFn, and thousands of servers like it.
This server
Across the catalogue