fire_number
FIRE Number Calculator — Financial-independence target from annual expenses and a safe withdrawal rate, plus lean/fat variants and years to reach it.
This record as markdown: /tools/com-wingmanprotocol-agent-gateway/fire-number.md
What fire_number does on Gateway
AI agents call fire_number to retrieve information from Gateway 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 |
|---|---|---|---|
inflation | number | — | Annual inflation as a PERCENT (default 0) |
annual_expenses | number | Yes | Expected annual spending in retirement, USD |
current_savings | number | — | Current invested savings in USD |
expected_return | number | — | Expected annual return as a PERCENT (default 7) |
withdrawal_rate | number | — | Safe withdrawal rate as a PERCENT (default 4) |
annual_contribution | number | — | Amount invested per year in USD |
Parameters from the server's own tool schema.
Why fire_number is rated Low
This tool performs purely mathematical/read calculations to estimate a financial independence target number. It does not move money, commit financial obligations, execute code, or modify any data. It is a calculator that returns computed results based on input parameters.
From the tool's definition FIRE Number Calculator — Financial-independence target from annual expenses and a safe withdrawal rate, plus lean/fat variants and years to reach it.
Attacks that exploit this kind of access
The rule that runs fire_number safely
PolicyLayer is an MCP gateway: it sits between your AI agents and Gateway, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For fire_number, this is the rule to start with:
fire_number 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 Gateway, apply this rule, and every fire_number call is checked against it from then on.
Questions about fire_number
FIRE Number Calculator — Financial-independence target from annual expenses and a safe withdrawal rate, plus lean/fat variants and years to reach it. It is categorised as a Read tool in the Gateway MCP Server, which means it retrieves data without modifying state.
fire_number accepts 6 parameters: inflation, annual_expenses, current_savings, expected_return, withdrawal_rate, annual_contribution. Required: annual_expenses. The full parameter table on this page comes from the server's own tool schema.
Register the Gateway MCP server in PolicyLayer and add a rule for fire_number: 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 Gateway. Nothing to install.
fire_number 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 fire_number 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 fire_number. 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.
fire_number is provided by the Gateway MCP server (https://wingmanprotocol.com/mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
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