# Lago MCP by usefulapi (io.usefulapi/lago): tool descriptions scored

- tools/list taken: 2026-11-02 (UTC)
- From: [Official MCP Registry](https://registry.modelcontextprotocol.io/v0/servers/io.usefulapi%2Flago/versions/latest)
- Connected to: https://lago.usefulapi.io/mcp
- Homepage: https://usefulapi.io/lago/
- Repository: https://github.com/m190/usefulapi-mcp
- Scoring rules: v2
- Tools: 24
- Average: 41.0 / 100 (Cloudy)
- Near-identical pairs: 8

This page shows how Lago MCP by usefulapi (io.usefulapi/lago)'s tool descriptions scored, the issues found and the names of its tools and parameters. The descriptions are the server's own: read them where the copy came from.

Forecall asked the URL this server lists in the official MCP Registry for its tools/list once, on the date above, without calling any tool. The server may have changed since.

## Across the server

No server-wide issues.

## Tools

- `lago_list_billable_metrics`: 36 / 100
  - Major: The description only restates the name (8 words).
  - Major: Says nothing about when to use it, or when not to.
  - Minor: No `required` list, so every argument is optional.
  - Minor: Says nothing about what it returns.
- `lago_list_coupons`: 36 / 100
  - Major: The description only restates the name (7 words).
  - Major: The description is too short (7 words).
  - Major: Says nothing about when to use it, or when not to.
  - Minor: No `required` list, so every argument is optional.
  - Minor: Says nothing about what it returns.
- `lago_list_customers`: 36 / 100
  - Major: The description only restates the name (9 words).
  - Major: Says nothing about when to use it, or when not to.
  - Minor: No `required` list, so every argument is optional.
  - Minor: Says nothing about what it returns.
- `lago_list_plans`: 36 / 100
  - Major: The description only restates the name (8 words).
  - Major: Says nothing about when to use it, or when not to.
  - Minor: No `required` list, so every argument is optional.
  - Minor: Says nothing about what it returns.
- `lago_get_plan`: 38 / 100
  - Major: Says nothing about when to use it, or when not to.
  - Minor: Says nothing about what it returns.
- `lago_list_credit_notes`: 38 / 100
  - Major: Says nothing about when to use it, or when not to.
  - Minor: No `required` list, so every argument is optional.
  - Minor: The description mentions none of its 3 or more arguments.
  - Minor: Says nothing about what it returns.
- `lago_list_customer_subscriptions`: 38 / 100
  - Major: Says nothing about when to use it, or when not to.
  - Minor: Says nothing about what it returns.
  - Minor: Required identifiers whose description does not say where the value comes from: external_customer_id. Name the tool or the place that returns it, or models look it up first.
- `lago_list_fees`: 39 / 100
  - Major: Says nothing about when to use it, or when not to.
  - Minor: No `required` list, so every argument is optional.
  - Minor: The description mentions none of its 3 or more arguments.
  - Minor: Says nothing about what it returns.
- `lago_list_invoices`: 39 / 100
  - Major: Says nothing about when to use it, or when not to.
  - Minor: No `required` list, so every argument is optional.
  - Minor: Says nothing about what it returns.
- `lago_list_subscriptions`: 39 / 100
  - Major: Says nothing about when to use it, or when not to.
  - Minor: No `required` list, so every argument is optional.
  - Minor: Says nothing about what it returns.
- `lago_analytics_gross_revenue`: 41 / 100
  - Major: Says nothing about when to use it, or when not to.
  - Minor: No `required` list, so every argument is optional.
  - Minor: The description mentions none of its 3 or more arguments.
  - Minor: Says nothing about what it returns.
- `lago_analytics_mrr`: 41 / 100
  - Major: Says nothing about when to use it, or when not to.
  - Minor: No `required` list, so every argument is optional.
  - Minor: Says nothing about what it returns.
- `lago_get_billable_metric`: 42 / 100
  - Major: Says nothing about when to use it, or when not to.
  - Minor: Says nothing about what it returns.
- `lago_get_customer`: 42 / 100
  - Major: Says nothing about when to use it, or when not to.
  - Minor: Says nothing about what it returns.
  - Minor: Required identifiers whose description does not say where the value comes from: external_customer_id. Name the tool or the place that returns it, or models look it up first.
- `lago_get_customer_current_usage`: 42 / 100
  - Major: Says nothing about when to use it, or when not to.
  - Minor: Says nothing about what it returns.
  - Minor: Required identifiers whose description does not say where the value comes from: external_customer_id, external_subscription_id. Name the tool or the place that returns it, or models look it up first.
- `lago_get_customer_past_usage`: 42 / 100
  - Major: Says nothing about when to use it, or when not to.
  - Minor: Says nothing about what it returns.
  - Minor: Required identifiers whose description does not say where the value comes from: external_customer_id, external_subscription_id. Name the tool or the place that returns it, or models look it up first.
- `lago_get_customer_portal_url`: 42 / 100
  - Major: Says nothing about when to use it, or when not to.
  - Minor: Says nothing about what it returns.
  - Minor: Required identifiers whose description does not say where the value comes from: external_customer_id. Name the tool or the place that returns it, or models look it up first.
- `lago_get_invoice`: 42 / 100
  - Major: Says nothing about when to use it, or when not to.
  - Minor: Says nothing about what it returns.
  - Minor: Required identifiers whose description does not say where the value comes from: lago_id. Name the tool or the place that returns it, or models look it up first.
- `lago_get_subscription`: 42 / 100
  - Major: Says nothing about when to use it, or when not to.
  - Minor: Says nothing about what it returns.
  - Minor: Required identifiers whose description does not say where the value comes from: external_id. Name the tool or the place that returns it, or models look it up first.
- `lago_list_add_ons`: 43 / 100
  - Major: The description is too short (7 words).
  - Major: Says nothing about when to use it, or when not to.
  - Minor: No `required` list, so every argument is optional.
  - Minor: Says nothing about what it returns.
- `lago_get_credit_note`: 45 / 100
  - Major: Says nothing about when to use it, or when not to.
  - Minor: Says nothing about what it returns.
  - Minor: Required identifiers whose description does not say where the value comes from: lago_id. Name the tool or the place that returns it, or models look it up first.
- `lago_list_wallets`: 45 / 100
  - Major: Says nothing about when to use it, or when not to.
  - Minor: Says nothing about what it returns.
  - Minor: Required identifiers whose description does not say where the value comes from: external_customer_id. Name the tool or the place that returns it, or models look it up first.
- `lago_create_customer`: 49 / 100
  - Major: Says nothing about when to use it, or when not to.
  - Minor: String arguments with no constraint or example: currency, legal_name, legal_number, tax_identification_number, phone, url, metadata[].key, metadata[].value.
  - Minor: The description mentions none of its 3 or more arguments.
  - Minor: Says nothing about what it returns.
  - Minor: Required identifiers whose description does not say where the value comes from: external_id. Name the tool or the place that returns it, or models look it up first.
- `lago_create_event`: 50 / 100
  - Major: Says nothing about when to use it, or when not to.
  - Minor: Says nothing about what it returns.

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