# Invoice Ninja MCP by usefulapi (io.usefulapi/invoice-ninja): tool descriptions scored

- tools/list taken: 2026-11-02 (UTC)
- From: [Official MCP Registry](https://registry.modelcontextprotocol.io/v0/servers/io.usefulapi%2Finvoice-ninja/versions/latest)
- Connected to: https://invoice-ninja.usefulapi.io/mcp
- Homepage: https://usefulapi.io/invoice-ninja/
- Repository: https://github.com/m190/usefulapi-mcp
- Scoring rules: v2
- Tools: 24
- Average: 47.2 / 100 (Cloudy)
- Near-identical pairs: 0

This page shows how Invoice Ninja MCP by usefulapi (io.usefulapi/invoice-ninja)'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

- `invoiceninja_create_client`: 34 / 100
  - Major: Says nothing about when to use it, or when not to.
  - Major: Arguments without a description: website, phone, address1, address2, city, state, postal_code, vat_number, public_notes, private_notes, contacts[].first_name, contacts[].last_name, contacts[].phone.
  - Minor: String arguments with no constraint or example: website, phone, address1, address2, city, state, postal_code, vat_number, public_notes, private_notes, contacts[].first_name, contacts[].last_name, contacts[].phone.
  - Minor: No `required` list, so every argument is optional.
  - Minor: Says nothing about what it returns.
- `invoiceninja_update_client`: 37 / 100
  - Major: Says nothing about when to use it, or when not to.
  - Major: Arguments without a description: website, phone, address1, address2, city, state, postal_code, vat_number, public_notes, private_notes, contacts[].first_name, contacts[].last_name, contacts[].phone.
  - Minor: String arguments with no constraint or example: website, phone, address1, address2, city, state, postal_code, vat_number, public_notes, private_notes, contacts[].first_name, contacts[].last_name, contacts[].phone.
  - Minor: Says nothing about what it returns.
  - Minor: Required identifiers whose description does not say where the value comes from: client_id. Name the tool or the place that returns it, or models look it up first.
- `invoiceninja_create_project`: 43 / 100
  - Major: Says nothing about when to use it, or when not to.
  - Minor: Arguments without a description: budgeted_hours, public_notes, private_notes.
  - Minor: String arguments with no constraint or example: due_date, public_notes, private_notes.
  - 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: client_id. Name the tool or the place that returns it, or models look it up first.
- `invoiceninja_create_task`: 43 / 100
  - Major: Says nothing about when to use it, or when not to.
  - Minor: String arguments with no constraint or example: client_id, project_id, due_date.
  - Minor: The description mentions none of its 3 or more arguments.
  - Minor: Says nothing about what it returns.
- `invoiceninja_create_expense`: 44 / 100
  - Major: Says nothing about when to use it, or when not to.
  - Minor: Arguments without a description: private_notes, tax_name1, tax_rate1.
  - Minor: String arguments with no constraint or example: date, vendor_id, project_id, public_notes, private_notes, transaction_reference, tax_name1.
  - Minor: The description mentions none of its 3 or more arguments.
  - Minor: Says nothing about what it returns.
- `invoiceninja_list_clients`: 44 / 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.
- `invoiceninja_list_expenses`: 44 / 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.
- `invoiceninja_list_projects`: 44 / 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.
- `invoiceninja_list_quotes`: 44 / 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.
- `invoiceninja_list_tasks`: 44 / 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.
- `invoiceninja_list_vendors`: 44 / 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.
- `invoiceninja_create_invoice`: 47 / 100
  - Major: Says nothing about when to use it, or when not to.
  - Minor: String arguments with no constraint or example: date, po_number, line_items[].notes, line_items[].tax_name2, terms, footer, tax_name1.
  - Minor: The description mentions none of its 3 or more arguments.
  - Minor: Says nothing about what it returns.
- `invoiceninja_create_quote`: 47 / 100
  - Major: Says nothing about when to use it, or when not to.
  - Minor: String arguments with no constraint or example: date, po_number, line_items[].notes, line_items[].tax_name2, terms, footer, tax_name1.
  - 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: client_id. Name the tool or the place that returns it, or models look it up first.
- `invoiceninja_list_invoices`: 47 / 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.
- `invoiceninja_list_products`: 47 / 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.
- `invoiceninja_list_recurring_invoices`: 47 / 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.
- `invoiceninja_update_invoice`: 50 / 100
  - Major: Says nothing about when to use it, or when not to.
  - Minor: String arguments with no constraint or example: date, po_number, line_items[].notes, line_items[].tax_name2, terms, footer, tax_name1.
  - Minor: Says nothing about what it returns.
  - Minor: Required identifiers whose description does not say where the value comes from: invoice_id. Name the tool or the place that returns it, or models look it up first.
- `invoiceninja_email_invoice`: 52 / 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: invoice_id. Name the tool or the place that returns it, or models look it up first.
- `invoiceninja_get_client`: 52 / 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: client_id. Name the tool or the place that returns it, or models look it up first.
- `invoiceninja_get_invoice`: 52 / 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: invoice_id. Name the tool or the place that returns it, or models look it up first.
- `invoiceninja_get_quote`: 55 / 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: quote_id. Name the tool or the place that returns it, or models look it up first.
- `invoiceninja_list_payments`: 55 / 100
  - 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.
- `invoiceninja_mark_invoice_sent`: 55 / 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: invoice_id. Name the tool or the place that returns it, or models look it up first.
- `invoiceninja_convert_quote_to_invoice`: 62 / 100
  - Major: Says nothing about when to use it, or when not to.
  - Minor: Required identifiers whose description does not say where the value comes from: quote_id. Name the tool or the place that returns it, or models look it up first.

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