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FastBill MCP by usefulapi: tool descriptions scored io.usefulapi/fastbill

tools/list taken
(UTC)
From
Official MCP Registry
Connected to
https://fastbill.usefulapi.io/mcp
Homepage
usefulapi.io/fastbill/
Repository
github.com/m190/usefulapi-mcp
Scoring rules
v2
Removal
support@forecall.dev
Score this URL as it is today

Scores, issues and names only

This page shows how FastBill MCP by usefulapi (io.usefulapi/fastbill)'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/fastbill
Average score
43.0 / 100Cloudy
Tools
22
Near-identical descriptions
0

Across the server

No server-wide issues.

Tools

fastbill_create_article

35 / 100Rain

Purpose
17 / 20
When to use
0 / 20
Arguments
11 / 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
  • Major
    Arguments without a description: title, unit_price, type, description, unit, currency_code, vat_percent, tags.param_no_description
  • Minor
    Says nothing about what it returns.no_return_info

fastbill_list_estimates

35 / 100Rain

Purpose
17 / 20
When to use
0 / 20
Arguments
11 / 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: customer_id, estimate_id, estimate_number.param_no_description
  • Minor
    String arguments with no constraint or example: start_date, end_date.loose_string_param
  • 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

fastbill_list_expenses

36 / 100Rain

Purpose
17 / 20
When to use
0 / 20
Arguments
12 / 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: invoice_id, invoice_number.param_no_description
  • Minor
    String arguments with no constraint or example: start_date, end_date, start_paid_date, end_paid_date.loose_string_param
  • 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

fastbill_list_revenues

36 / 100Rain

Purpose
17 / 20
When to use
0 / 20
Arguments
12 / 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: customer_id, invoice_number.param_no_description
  • Minor
    String arguments with no constraint or example: start_date, end_date, start_paid_date, end_paid_date.loose_string_param
  • 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

fastbill_list_articles

37 / 100Rain

Purpose
17 / 20
When to use
0 / 20
Arguments
13 / 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: article_id, article_number.param_no_description
  • 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

fastbill_list_projects

37 / 100Rain

Purpose
17 / 20
When to use
0 / 20
Arguments
13 / 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: project_id, customer_id.param_no_description
  • 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

fastbill_create_project

38 / 100Rain

Purpose
17 / 20
When to use
0 / 20
Arguments
14 / 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: project_name, currency_code, vat_percent.param_no_description
  • Minor
    String arguments with no constraint or example: start_date, end_date.loose_string_param
  • 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: customer_id. Name the tool or the place that returns it, or models look it up first.id_source_missing

fastbill_create_time_entry

39 / 100Rain

Purpose
17 / 20
When to use
0 / 20
Arguments
15 / 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: customer_id, project_id, billable_minutes, comment.param_no_description
  • Minor
    String arguments with no constraint or example: date.loose_string_param
  • 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: customer_id, project_id. Name the tool or the place that returns it, or models look it up first.id_source_missing

fastbill_get_customer

40 / 100Cloudy

Purpose
10 / 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: customer_id. Name the tool or the place that returns it, or models look it up first.id_source_missing

fastbill_list_recurring_invoices

40 / 100Cloudy

Purpose
13 / 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

fastbill_list_contacts

41 / 100Cloudy

Purpose
17 / 20
When to use
0 / 20
Arguments
17 / 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: customer_number.param_no_description
  • Minor
    No `required` list, so every argument is optional.no_required
  • Minor
    Says nothing about what it returns.no_return_info

fastbill_list_time_entries

43 / 100Cloudy

Purpose
20 / 20
When to use
0 / 20
Arguments
9 / 25
Return value
7 / 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: customer_id, project_id, time_id.param_no_description
  • Minor
    String arguments with no constraint or example: date, start_date, end_date.loose_string_param
  • Minor
    No `required` list, so every argument is optional.no_required

fastbill_update_customer

43 / 100Cloudy

Purpose
17 / 20
When to use
0 / 20
Arguments
14 / 25
Return value
0 / 15
Constraints and side effects
7 / 10
Examples
5 / 10
  • Major
    Says nothing about when to use it, or when not to.no_usage_context
  • Major
    Arguments without a description: customer_type, first_name, salutation, position, academic_degree, address, address_2, zipcode, city, email, phone, mobile, website, currency_code.param_no_description
  • 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: customer_id. Name the tool or the place that returns it, or models look it up first.id_source_missing

fastbill_get_invoice

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: invoice_id. Name the tool or the place that returns it, or models look it up first.id_source_missing

fastbill_list_invoices

44 / 100Cloudy

Purpose
20 / 20
When to use
0 / 20
Arguments
14 / 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
    Arguments without a description: customer_id, invoice_number.param_no_description
  • Minor
    String arguments with no constraint or example: start_due_date, end_due_date, start_paid_date, end_paid_date, end_lastupdate.loose_string_param
  • Minor
    No `required` list, so every argument is optional.no_required
  • Minor
    Says nothing about what it returns.no_return_info

fastbill_create_customer

46 / 100Cloudy

Purpose
20 / 20
When to use
0 / 20
Arguments
14 / 25
Return value
0 / 15
Constraints and side effects
7 / 10
Examples
5 / 10
  • Major
    Says nothing about when to use it, or when not to.no_usage_context
  • Major
    Arguments without a description: first_name, salutation, position, academic_degree, address, address_2, zipcode, city, email, phone, mobile, website, currency_code.param_no_description
  • Minor
    Says nothing about what it returns.no_return_info

fastbill_list_templates

47 / 100Cloudy

Purpose
20 / 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

fastbill_list_customers

49 / 100Cloudy

Purpose
20 / 20
When to use
0 / 20
Arguments
17 / 25
Return value
0 / 15
Constraints and side effects
7 / 10
Examples
5 / 10
  • Major
    Says nothing about when to use it, or when not to.no_usage_context
  • Minor
    Arguments without a description: city.param_no_description
  • Minor
    No `required` list, so every argument is optional.no_required
  • Minor
    Says nothing about what it returns.no_return_info

fastbill_set_invoice_paid

49 / 100Cloudy

Purpose
17 / 20
When to use
0 / 20
Arguments
20 / 25
Return value
0 / 15
Constraints and side effects
7 / 10
Examples
5 / 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: invoice_id. Name the tool or the place that returns it, or models look it up first.id_source_missing

fastbill_create_estimate

50 / 100Cloudy

Purpose
17 / 20
When to use
0 / 20
Arguments
21 / 25
Return value
0 / 15
Constraints and side effects
7 / 10
Examples
5 / 10
  • Major
    Says nothing about when to use it, or when not to.no_usage_context
  • Minor
    Arguments without a description: currency_code.param_no_description
  • Minor
    String arguments with no constraint or example: estimate_date.loose_string_param
  • Minor
    Says nothing about what it returns.no_return_info

fastbill_complete_invoice

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
    Says nothing about what it returns.no_return_info
  • 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.id_source_missing

fastbill_create_invoice

61 / 100Cloudy

Purpose
20 / 20
When to use
5 / 20
Arguments
17 / 25
Return value
7 / 15
Constraints and side effects
7 / 10
Examples
5 / 10
  • Minor
    Arguments without a description: currency_code, invoice_title, cash_discount_percent, cash_discount_days, customer_order_reference, contract_reference.param_no_description
  • Minor
    String arguments with no constraint or example: invoice_date, delivery_date, service_period_start, service_period_end.loose_string_param

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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