Sarbacane MCP by usefulapi: tool descriptions scored io.usefulapi/sarbacane

tools/list taken: 2026-11-02 (UTC)
From: Official MCP Registry
Connected to: https://sarbacane.usefulapi.io/mcp
Homepage: usefulapi.io/sarbacane/
Repository: github.com/m190/usefulapi-mcp
Scoring rules: v2
Removal: support@forecall.dev

Scores, issues and names only

This page shows how Sarbacane MCP by usefulapi (io.usefulapi/sarbacane)'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.

servers/io.usefulapi/sarbacane

Average score: 46.1 / 100Cloudy
Tools: 19
Near-identical descriptions: 0

Across the server

No server-wide issues.

Tools

sarbacane_list_blacklists

41 / 100Cloudy

Purpose: 14 / 20
When to use: 0 / 20
Arguments: 20 / 25
Return value: 0 / 15
Constraints and side effects: 7 / 10
Examples: 0 / 10

Major
Says nothing about when to use it, or when not to.no_usage_context
Minor
No `required` list, so every argument is optional.no_required
Minor
Says nothing about what it returns.no_return_info

sarbacane_list_lists

41 / 100Cloudy

Purpose: 14 / 20
When to use: 0 / 20
Arguments: 20 / 25
Return value: 0 / 15
Constraints and side effects: 7 / 10
Examples: 0 / 10

Major
Says nothing about when to use it, or when not to.no_usage_context
Minor
No `required` list, so every argument is optional.no_required
Minor
Says nothing about what it returns.no_return_info

sarbacane_add_unsubscriber

43 / 100Cloudy

Purpose: 20 / 20
When to use: 0 / 20
Arguments: 13 / 25
Return value: 0 / 15
Constraints and side effects: 10 / 10
Examples: 0 / 10

Major
Says nothing about when to use it, or when not to.no_usage_context
Major
Arguments without a description: email, phone.param_no_description
Minor
Says nothing about what it returns.no_return_info
Minor
Required identifiers whose description does not say where the value comes from: blacklist_id. Name the tool or the place that returns it, or models look it up first.id_source_missing

sarbacane_create_contact

43 / 100Cloudy

Purpose: 20 / 20
When to use: 0 / 20
Arguments: 16 / 25
Return value: 0 / 15
Constraints and side effects: 7 / 10
Examples: 0 / 10

Major
Says nothing about when to use it, or when not to.no_usage_context
Minor
Arguments without a description: email, phone.param_no_description
Minor
Says nothing about what it returns.no_return_info

sarbacane_get_campaign

44 / 100Cloudy

Purpose: 14 / 20
When to use: 0 / 20
Arguments: 23 / 25
Return value: 0 / 15
Constraints and side effects: 7 / 10
Examples: 0 / 10

Major
Says nothing about when to use it, or when not to.no_usage_context
Minor
Says nothing about what it returns.no_return_info
Minor
Required identifiers whose description does not say where the value comes from: campaign_id. Name the tool or the place that returns it, or models look it up first.id_source_missing

sarbacane_get_campaign_report

44 / 100Cloudy

Purpose: 14 / 20
When to use: 0 / 20
Arguments: 23 / 25
Return value: 0 / 15
Constraints and side effects: 7 / 10
Examples: 0 / 10

Major
Says nothing about when to use it, or when not to.no_usage_context
Minor
Says nothing about what it returns.no_return_info
Minor
Required identifiers whose description does not say where the value comes from: campaign_id. Name the tool or the place that returns it, or models look it up first.id_source_missing

sarbacane_list_campaign_recipients

44 / 100Cloudy

Purpose: 14 / 20
When to use: 0 / 20
Arguments: 23 / 25
Return value: 0 / 15
Constraints and side effects: 7 / 10
Examples: 0 / 10

Major
Says nothing about when to use it, or when not to.no_usage_context
Minor
The description mentions none of its 3 or more arguments.params_not_in_description
Minor
Says nothing about what it returns.no_return_info
Minor
Required identifiers whose description does not say where the value comes from: campaign_id. Name the tool or the place that returns it, or models look it up first.id_source_missing

sarbacane_list_campaigns

44 / 100Cloudy

Purpose: 17 / 20
When to use: 0 / 20
Arguments: 20 / 25
Return value: 0 / 15
Constraints and side effects: 7 / 10
Examples: 0 / 10

Major
Says nothing about when to use it, or when not to.no_usage_context
Minor
No `required` list, so every argument is optional.no_required
Minor
Says nothing about what it returns.no_return_info

sarbacane_list_users

44 / 100Cloudy

Purpose: 17 / 20
When to use: 0 / 20
Arguments: 20 / 25
Return value: 0 / 15
Constraints and side effects: 7 / 10
Examples: 0 / 10

Major
Says nothing about when to use it, or when not to.no_usage_context
Minor
No `required` list, so every argument is optional.no_required
Minor
The description mentions none of its 3 or more arguments.params_not_in_description
Minor
Says nothing about what it returns.no_return_info

sarbacane_list_webhooks

46 / 100Cloudy

Purpose: 14 / 20
When to use: 0 / 20
Arguments: 25 / 25
Return value: 0 / 15
Constraints and side effects: 7 / 10
Examples: 0 / 10

Major
Says nothing about when to use it, or when not to.no_usage_context
Minor
Says nothing about what it returns.no_return_info

sarbacane_import_campaign_template

47 / 100Cloudy

Purpose: 17 / 20
When to use: 0 / 20
Arguments: 23 / 25
Return value: 0 / 15
Constraints and side effects: 7 / 10
Examples: 0 / 10

Major
Says nothing about when to use it, or when not to.no_usage_context
Minor
Says nothing about what it returns.no_return_info
Minor
Required identifiers whose description does not say where the value comes from: campaign_id, template_id. Name the tool or the place that returns it, or models look it up first.id_source_missing

sarbacane_list_blacklist_entries

47 / 100Cloudy

Purpose: 17 / 20
When to use: 0 / 20
Arguments: 23 / 25
Return value: 0 / 15
Constraints and side effects: 7 / 10
Examples: 0 / 10

Major
Says nothing about when to use it, or when not to.no_usage_context
Minor
Says nothing about what it returns.no_return_info
Minor
Required identifiers whose description does not say where the value comes from: blacklist_id. Name the tool or the place that returns it, or models look it up first.id_source_missing

sarbacane_list_contacts

47 / 100Cloudy

Purpose: 17 / 20
When to use: 0 / 20
Arguments: 23 / 25
Return value: 0 / 15
Constraints and side effects: 7 / 10
Examples: 0 / 10

Major
Says nothing about when to use it, or when not to.no_usage_context
Minor
Says nothing about what it returns.no_return_info
Minor
Required identifiers whose description does not say where the value comes from: list_id. Name the tool or the place that returns it, or models look it up first.id_source_missing

sarbacane_set_campaign_list

47 / 100Cloudy

Purpose: 17 / 20
When to use: 0 / 20
Arguments: 23 / 25
Return value: 0 / 15
Constraints and side effects: 7 / 10
Examples: 0 / 10

Major
Says nothing about when to use it, or when not to.no_usage_context
Minor
Says nothing about what it returns.no_return_info
Minor
Required identifiers whose description does not say where the value comes from: campaign_id, list_id. Name the tool or the place that returns it, or models look it up first.id_source_missing

sarbacane_upsert_contact

48 / 100Cloudy

Purpose: 20 / 20
When to use: 5 / 20
Arguments: 16 / 25
Return value: 0 / 15
Constraints and side effects: 7 / 10
Examples: 0 / 10

Minor
Arguments without a description: email, phone.param_no_description
Minor
Says nothing about what it returns.no_return_info
Minor
Required identifiers whose description does not say where the value comes from: list_id. Name the tool or the place that returns it, or models look it up first.id_source_missing

sarbacane_get_credits

49 / 100Cloudy

Purpose: 14 / 20
When to use: 0 / 20
Arguments: 25 / 25
Return value: 0 / 15
Constraints and side effects: 10 / 10
Examples: 0 / 10

Major
Says nothing about when to use it, or when not to.no_usage_context
Minor
Says nothing about what it returns.no_return_info

sarbacane_set_campaign_content

50 / 100Cloudy

Purpose: 20 / 20
When to use: 0 / 20
Arguments: 23 / 25
Return value: 0 / 15
Constraints and side effects: 7 / 10
Examples: 0 / 10

Major
Says nothing about when to use it, or when not to.no_usage_context
Minor
Says nothing about what it returns.no_return_info
Minor
Required identifiers whose description does not say where the value comes from: campaign_id. Name the tool or the place that returns it, or models look it up first.id_source_missing

sarbacane_list_list_fields

52 / 100Cloudy

Purpose: 17 / 20
When to use: 5 / 20
Arguments: 23 / 25
Return value: 0 / 15
Constraints and side effects: 7 / 10
Examples: 0 / 10

Minor
Says nothing about what it returns.no_return_info
Minor
Required identifiers whose description does not say where the value comes from: list_id. Name the tool or the place that returns it, or models look it up first.id_source_missing

sarbacane_create_email_campaign

55 / 100Cloudy

Purpose: 20 / 20
When to use: 5 / 20
Arguments: 23 / 25
Return value: 0 / 15
Constraints and side effects: 7 / 10
Examples: 0 / 10

Minor
The description mentions none of its 3 or more arguments.params_not_in_description
Minor
Says nothing about what it returns.no_return_info

What static scoring cannot tell

This score reads only the text of each description and schema: it says what is written, not what a model will do. Short tools whose names already say what they do, such as browser_close, score low here even when models use them well, and in our measurements current models chose the right tool in one step even from one-line descriptions, as long as the names and schemas differed. What the text cannot show, such as what happens over several steps and whether an added sentence helps or misleads, is what an evaluation measures, on the Pro and Team plans.

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