irr

Internal Rate of Return (IRR) Calculator — The discount rate where NPV=0 for a cash-flow series (solved by bisection).

SERVERGateway SOURCEhttps://wingmanprotocol.com/mcp

Low RISK CLASS

Category Read

Parameters 11 required

Recommended Allowedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/com-wingmanprotocol-agent-gateway/irr.md

WHAT IT DOES

What irr does on Gateway

AI agents call irr 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
`cash_flows`	array	Yes	Array of cash flows with at least one sign change

Parameters from the server's own tool schema.

RISK

Why irr is rated Low

This tool performs a pure mathematical/financial calculation (computing IRR via bisection method) on input cash flows. It does not move money, execute code, modify data, or delete anything — it only computes and returns a numerical result. Despite being in the financial domain, it is a read/calculate-only operation with no side effects.

From the tool's definition Internal Rate of Return (IRR) Calculator — The discount rate where NPV=0 for a cash-flow series (solved by bisection)

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs irr 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 irr, this is the rule to start with:

irr Allowed

irr 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": {
    "irr": {}
  }
}

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

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

FAQ

Questions about irr

What does the irr tool do? +

Internal Rate of Return (IRR) Calculator — The discount rate where NPV=0 for a cash-flow series (solved by bisection). It is categorised as a Read tool in the Gateway MCP Server, which means it retrieves data without modifying state.

What parameters does irr accept? +

irr accepts 1 parameter: cash_flows. Required: cash_flows. The full parameter table on this page comes from the server's own tool schema.

How do I enforce a policy on irr? +

Register the Gateway MCP server in PolicyLayer and add a rule for irr: 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.

What risk level is irr? +

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

Can I rate-limit irr? +

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

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

irr 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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