TTSForFree: tool descriptions scored io.github.CalmNguyen/ttsforfree

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

Scores, issues and names only

This page shows how TTSForFree (io.github.CalmNguyen/ttsforfree)'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.github.CalmNguyen/ttsforfree

Average score: 55.1 / 100Cloudy
Tools: 21
Near-identical descriptions: 1

Across the server

Minor
The server's instructions are 2458 characters. Claude Code reads only the first 2,048 by default (Codex 0.154.0 reads them whole). Put what the server is for first.instructions_long

Tools whose descriptions are nearly the same

1 of 1 pairs shown, highest description similarity first.
Tool	Tool	Description similarity	Name similarity
add_favorite_voice	remove_favorite_voice	0.75	0.50

Tools

get_transcription

38 / 100Rain

Purpose: 13 / 20
When to use: 0 / 20
Arguments: 18 / 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: job_id.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: job_id. Name the tool or the place that returns it, or models look it up first.id_source_missing

list_recent_jobs

41 / 100Cloudy

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

Major
Arguments without a description: job_type, limit.param_no_description
Minor
No `required` list, so every argument is optional.no_required
Minor
Says nothing about what it returns.no_return_info

get_job_detail

42 / 100Cloudy

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

Major
Arguments without a description: job_id.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: job_id. Name the tool or the place that returns it, or models look it up first.id_source_missing

get_localization_status

47 / 100Cloudy

Purpose: 17 / 20
When to use: 5 / 20
Arguments: 18 / 25
Return value: 0 / 15
Constraints and side effects: 7 / 10
Examples: 0 / 10

Minor
Arguments without a description: job_guids.param_no_description
Minor
Says nothing about what it returns.no_return_info

get_voice_details

47 / 100Cloudy

Purpose: 17 / 20
When to use: 0 / 20
Arguments: 20 / 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

estimate_video_localization

48 / 100Cloudy

Purpose: 20 / 20
When to use: 0 / 20
Arguments: 13 / 25
Return value: 0 / 15
Constraints and side effects: 10 / 10
Examples: 5 / 10

Major
Says nothing about when to use it, or when not to.no_usage_context
Minor
Arguments without a description: video_url, duration_seconds, source_language.param_no_description
Minor
String arguments with no constraint or example: video_url, source_language.loose_string_param
Minor
Says nothing about what it returns.no_return_info

multi_voice_to_speech

53 / 100Cloudy

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

Major
Arguments without a description: segments, segments[].text, segments[].speed, segments[].volume.param_no_description
Minor
String arguments with no constraint or example: segments[].voice.loose_string_param
Minor
Says nothing about what it returns.no_return_info

add_favorite_voice

54 / 100Cloudy

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

Minor
Its description is nearly the same as remove_favorite_voice's (similarity 0.75); only the names and schemas tell them apart. Say in this description when to use remove_favorite_voice instead.confusable_pair
Minor
Says nothing about what it returns.no_return_info

list_favorite_voices

54 / 100Cloudy

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

Minor
Says nothing about what it returns.no_return_info

remove_favorite_voice

54 / 100Cloudy

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

Minor
Its description is nearly the same as add_favorite_voice's (similarity 0.75); only the names and schemas tell them apart. Say in this description when to use add_favorite_voice instead.confusable_pair
Minor
Says nothing about what it returns.no_return_info

create_upload_url

55 / 100Cloudy

Purpose: 20 / 20
When to use: 5 / 20
Arguments: 13 / 25
Return value: 0 / 15
Constraints and side effects: 7 / 10
Examples: 10 / 10

Minor
Arguments without a description: file_size_bytes.param_no_description
Minor
Says nothing about what it returns.no_return_info

get_account_status

55 / 100Cloudy

Purpose: 20 / 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

get_job_status

56 / 100Cloudy

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

Minor
Arguments without a description: job_id.param_no_description
Minor
The description mentions none of its 3 or more arguments.params_not_in_description
Minor
Required identifiers whose description does not say where the value comes from: job_id. Name the tool or the place that returns it, or models look it up first.id_source_missing

list_languages

56 / 100Cloudy

Purpose: 17 / 20
When to use: 0 / 20
Arguments: 25 / 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

localize_video

59 / 100Cloudy

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

Major
Says nothing about when to use it, or when not to.no_usage_context
Minor
String arguments with no constraint or example: video_url.loose_string_param
Minor
The description mentions none of its 3 or more arguments.params_not_in_description

transcribe_media

59 / 100Cloudy

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

Major
Says nothing about when to use it, or when not to.no_usage_context

srt_to_speech

63 / 100Cloudy

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

Minor
Arguments without a description: segments[].text, segments[].start_ms, segments[].end_ms, segments[].speed.param_no_description
Minor
No `required` list, so every argument is optional.no_required
Minor
Says nothing about what it returns.no_return_info

design_custom_voice

64 / 100Cloudy

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

Major
Says nothing about when to use it, or when not to.no_usage_context
Minor
Arguments without a description: display_name, gender.param_no_description
Minor
The description mentions none of its 3 or more arguments.params_not_in_description

list_my_custom_voices

67 / 100Cloudy

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

Major
Says nothing about when to use it, or when not to.no_usage_context

text_to_speech

69 / 100Cloudy

Purpose: 20 / 20
When to use: 10 / 20
Arguments: 22 / 25
Return value: 7 / 15
Constraints and side effects: 10 / 10
Examples: 0 / 10

Minor
String arguments with no constraint or example: voice.loose_string_param

list_voices

76 / 100Clear

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

Minor
Arguments without a description: gender, limit.param_no_description

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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