saas_metrics
SaaS MRR / ARR Metrics Calculator — Ending MRR, ARR, net new MRR, gross churn, net revenue retention and quick ratio.
This record as markdown: /tools/com-wingmanprotocol-agent-gateway/saas-metrics.md
What saas_metrics does on Gateway
AI agents call saas_metrics 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 |
|---|---|---|---|
new_mrr | number | — | New MRR from new customers, USD |
churned_mrr | number | — | Churned MRR, USD |
starting_mrr | number | Yes | MRR at the start of the period, USD |
expansion_mrr | number | — | Expansion/upgrade MRR, USD |
contraction_mrr | number | — | Contraction/downgrade MRR, USD |
Parameters from the server's own tool schema.
Why saas_metrics is rated Low
This is a calculator tool that derives insights from SaaS business metrics. It performs read-only computations on input data to produce financial analytics output. There is no indication it modifies data, executes arbitrary code, deletes anything, or actually processes financial transactions. The tool retrieves/calculates information rather than taking actions with side effects.
From the tool's definition Tool is described as a 'SaaS MRR / ARR Metrics Calculator' that computes financial metrics (Ending MRR, ARR, net new MRR, gross churn, net revenue retention, quick ratio).
Attacks that exploit this kind of access
The rule that runs saas_metrics 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 saas_metrics, this is the rule to start with:
saas_metrics 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 saas_metrics call is checked against it from then on.
Questions about saas_metrics
SaaS MRR / ARR Metrics Calculator — Ending MRR, ARR, net new MRR, gross churn, net revenue retention and quick ratio. It is categorised as a Read tool in the Gateway MCP Server, which means it retrieves data without modifying state.
saas_metrics accepts 5 parameters: new_mrr, churned_mrr, starting_mrr, expansion_mrr, contraction_mrr. Required: starting_mrr. 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 saas_metrics: 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.
saas_metrics 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 saas_metrics 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 saas_metrics. 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.
saas_metrics 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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