AppTail – ASO & Keyword Research: tool descriptions scored io.apptail/apptail

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

Scores, issues and names only

This page shows how AppTail – ASO & Keyword Research (io.apptail/apptail)'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.apptail/apptail

Average score: 67.0 / 100Cloudy
Tools: 25
Near-identical descriptions: 0

Across the server

Minor
The server's instructions are 14074 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

get_top_charts

54 / 100Cloudy

Purpose: 17 / 20
When to use: 0 / 20
Arguments: 17 / 25
Return value: 8 / 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
No `required` list, so every argument is optional.no_required

list_markets

58 / 100Cloudy

Purpose: 20 / 20
When to use: 0 / 20
Arguments: 15 / 25
Return value: 8 / 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
No `required` list, so every argument is optional.no_required

remove_market

58 / 100Cloudy

Purpose: 20 / 20
When to use: 0 / 20
Arguments: 18 / 25
Return value: 8 / 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
Required identifiers whose description does not say where the value comes from: market_id. Name the tool or the place that returns it, or models look it up first.id_source_missing

remove_keywords

61 / 100Cloudy

Purpose: 20 / 20
When to use: 0 / 20
Arguments: 23 / 25
Return value: 8 / 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
Required identifiers whose description does not say where the value comes from: app_id. Name the tool or the place that returns it, or models look it up first.id_source_missing

get_account

62 / 100Cloudy

Purpose: 17 / 20
When to use: 0 / 20
Arguments: 20 / 25
Return value: 8 / 15
Constraints and side effects: 7 / 10
Examples: 10 / 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

get_keyword_serp

62 / 100Cloudy

Purpose: 17 / 20
When to use: 5 / 20
Arguments: 15 / 25
Return value: 8 / 15
Constraints and side effects: 7 / 10
Examples: 10 / 10

Minor
No `required` list, so every argument is optional.no_required

get_market

62 / 100Cloudy

Purpose: 20 / 20
When to use: 0 / 20
Arguments: 15 / 25
Return value: 15 / 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
No `required` list, so every argument is optional.no_required

add_app

63 / 100Cloudy

Purpose: 20 / 20
When to use: 5 / 20
Arguments: 18 / 25
Return value: 8 / 15
Constraints and side effects: 7 / 10
Examples: 5 / 10

No issues.

explain_period

63 / 100Cloudy

Purpose: 20 / 20
When to use: 0 / 20
Arguments: 16 / 25
Return value: 15 / 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
No `required` list, so every argument is optional.no_required

get_keywords

63 / 100Cloudy

Purpose: 17 / 20
When to use: 5 / 20
Arguments: 16 / 25
Return value: 8 / 15
Constraints and side effects: 7 / 10
Examples: 10 / 10

Minor
No `required` list, so every argument is optional.no_required

get_signals

63 / 100Cloudy

Purpose: 17 / 20
When to use: 5 / 20
Arguments: 16 / 25
Return value: 8 / 15
Constraints and side effects: 7 / 10
Examples: 10 / 10

Minor
No `required` list, so every argument is optional.no_required

get_reviews

65 / 100Cloudy

Purpose: 17 / 20
When to use: 5 / 20
Arguments: 18 / 25
Return value: 8 / 15
Constraints and side effects: 7 / 10
Examples: 10 / 10

Minor
Required identifiers whose description does not say where the value comes from: app_id. Name the tool or the place that returns it, or models look it up first.id_source_missing

get_competitors

68 / 100Cloudy

Purpose: 20 / 20
When to use: 5 / 20
Arguments: 23 / 25
Return value: 8 / 15
Constraints and side effects: 7 / 10
Examples: 5 / 10

Minor
Required identifiers whose description does not say where the value comes from: app_id. Name the tool or the place that returns it, or models look it up first.id_source_missing

get_landscape

68 / 100Cloudy

Purpose: 20 / 20
When to use: 5 / 20
Arguments: 18 / 25
Return value: 8 / 15
Constraints and side effects: 7 / 10
Examples: 10 / 10

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

get_performance

68 / 100Cloudy

Purpose: 20 / 20
When to use: 0 / 20
Arguments: 18 / 25
Return value: 15 / 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
No `required` list, so every argument is optional.no_required

search_apps

68 / 100Cloudy

Purpose: 20 / 20
When to use: 5 / 20
Arguments: 18 / 25
Return value: 8 / 15
Constraints and side effects: 7 / 10
Examples: 10 / 10

No issues.

get_app

70 / 100Clear

Purpose: 17 / 20
When to use: 0 / 20
Arguments: 18 / 25
Return value: 15 / 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
Required identifiers whose description does not say where the value comes from: app_id. Name the tool or the place that returns it, or models look it up first.id_source_missing

tag_keywords

70 / 100Clear

Purpose: 20 / 20
When to use: 5 / 20
Arguments: 20 / 25
Return value: 8 / 15
Constraints and side effects: 7 / 10
Examples: 10 / 10

Minor
Required identifiers whose description does not say where the value comes from: app_id. Name the tool or the place that returns it, or models look it up first.id_source_missing

add_competitors

73 / 100Clear

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

Minor
Required identifiers whose description does not say where the value comes from: app_id. Name the tool or the place that returns it, or models look it up first.id_source_missing

remove_competitors

73 / 100Clear

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

Minor
Required identifiers whose description does not say where the value comes from: app_id. Name the tool or the place that returns it, or models look it up first.id_source_missing

reply_to_reviews

73 / 100Clear

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

No issues.

save_market

73 / 100Clear

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

No issues.

discover_keywords

75 / 100Clear

Purpose: 17 / 20
When to use: 15 / 20
Arguments: 18 / 25
Return value: 8 / 15
Constraints and side effects: 7 / 10
Examples: 10 / 10

No issues.

add_keywords

76 / 100Clear

Purpose: 20 / 20
When to use: 10 / 20
Arguments: 18 / 25
Return value: 8 / 15
Constraints and side effects: 10 / 10
Examples: 10 / 10

No issues.

edit_market_corpus

85 / 100Clear

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

Minor
Required identifiers whose description does not say where the value comes from: market_id. Name the tool or the place that returns it, or models look it up first.id_source_missing

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.

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