# Rinkel MCP by usefulapi (io.usefulapi/rinkel): tool descriptions scored

- tools/list taken: 2026-11-02 (UTC)
- From: [Official MCP Registry](https://registry.modelcontextprotocol.io/v0/servers/io.usefulapi%2Frinkel/versions/latest)
- Connected to: https://rinkel.usefulapi.io/mcp
- Homepage: https://usefulapi.io/rinkel/
- Repository: https://github.com/m190/usefulapi-mcp
- Scoring rules: v2
- Tools: 27
- Average: 56.1 / 100 (Cloudy)
- Near-identical pairs: 0

This page shows how Rinkel MCP by usefulapi (io.usefulapi/rinkel)'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

- Minor: 27 tools. Above 25, models start to tell tools apart less well.

## Tools

- `rinkel_get_contact`: 43 / 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: contact_id. Name the tool or the place that returns it, or models look it up first.
- `rinkel_count_new_voicemails`: 46 / 100
  - Major: Says nothing about when to use it, or when not to.
  - Minor: Says nothing about what it returns.
- `rinkel_create_contact`: 47 / 100
  - Major: Says nothing about when to use it, or when not to.
  - Minor: Arguments without a description: first_name, last_name, company_name, email.
  - Minor: Says nothing about what it returns.
- `rinkel_list_recordings`: 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.
- `rinkel_list_contacts`: 49 / 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.
- `rinkel_list_numbers`: 49 / 100
  - Major: Says nothing about when to use it, or when not to.
  - Minor: Says nothing about what it returns.
- `rinkel_list_webhooks`: 49 / 100
  - Major: Says nothing about when to use it, or when not to.
  - Minor: Says nothing about what it returns.
- `rinkel_get_number`: 50 / 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: number_id. Name the tool or the place that returns it, or models look it up first.
- `rinkel_unblock_number`: 50 / 100
  - Major: Says nothing about when to use it, or when not to.
  - Minor: Says nothing about what it returns.
- `rinkel_get_user`: 52 / 100
  - Major: Says nothing about when to use it, or when not to.
  - Minor: The meaning of the boolean argument include_avatar is unclear.
  - Minor: Says nothing about what it returns.
  - Minor: Required identifiers whose description does not say where the value comes from: user_id. Name the tool or the place that returns it, or models look it up first.
- `rinkel_list_users`: 52 / 100
  - Major: Says nothing about when to use it, or when not to.
  - Minor: No `required` list, so every argument is optional.
  - Minor: The meaning of the boolean argument include_avatars is unclear.
  - Minor: Says nothing about what it returns.
- `rinkel_list_voicemails`: 52 / 100
  - Major: Says nothing about when to use it, or when not to.
  - Minor: No `required` list, so every argument is optional.
- `rinkel_find_contact_by_number`: 57 / 100
  - Minor: Says nothing about what it returns.
- `rinkel_delete_contact`: 58 / 100
  - Minor: Says nothing about what it returns.
  - Minor: Required identifiers whose description does not say where the value comes from: contact_id. Name the tool or the place that returns it, or models look it up first.
- `rinkel_update_contact`: 58 / 100
  - Minor: Arguments without a description: first_name, last_name, company_name, email.
  - Minor: Says nothing about what it returns.
  - Minor: Required identifiers whose description does not say where the value comes from: contact_id. Name the tool or the place that returns it, or models look it up first.
- `rinkel_add_call_note`: 60 / 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: call_record_id. Name the tool or the place that returns it, or models look it up first.
- `rinkel_delete_call_note`: 60 / 100
  - Minor: Says nothing about what it returns.
- `rinkel_get_call`: 60 / 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: call_record_id. Name the tool or the place that returns it, or models look it up first.
- `rinkel_get_call_by_network_id`: 60 / 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: network_call_id. Name the tool or the place that returns it, or models look it up first.
- `rinkel_get_voicemail_url`: 60 / 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: voicemail_id. Name the tool or the place that returns it, or models look it up first.
- `rinkel_update_call_note`: 60 / 100
  - Major: Says nothing about when to use it, or when not to.
  - 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: call_record_id, note_id. Name the tool or the place that returns it, or models look it up first.
- `rinkel_validate_phone_number`: 62 / 100
  - Major: Says nothing about when to use it, or when not to.
- `rinkel_block_number`: 65 / 100
  - Minor: Says nothing about what it returns.
- `rinkel_get_call_transcription`: 65 / 100
  - Minor: Says nothing about what it returns.
  - Minor: Required identifiers whose description does not say where the value comes from: network_call_id. Name the tool or the place that returns it, or models look it up first.
- `rinkel_list_calls`: 65 / 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.
- `rinkel_start_call`: 68 / 100
  - Minor: Says nothing about what it returns.
  - Minor: Required identifiers whose description does not say where the value comes from: device_id, number_id. Name the tool or the place that returns it, or models look it up first.
- `rinkel_get_call_recording_url`: 70 / 100
  - Minor: Says nothing about what it returns.
  - Minor: Required identifiers whose description does not say where the value comes from: call_recording_id. Name the tool or the place that returns it, or models look it up first.

Is your server listed here and you would rather it were not? Email support@forecall.dev, and we will take it off within 7 days.

[All scored servers](https://forecall.dev/en/servers)