Arena Predictions: tool descriptions scored com.arena-predictions/arena

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

Scores, issues and names only

This page shows how Arena Predictions (com.arena-predictions/arena)'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/com.arena-predictions/arena

Average score: 53.0 / 100Cloudy
Tools: 30
Near-identical descriptions: 0

Across the server

Minor
30 tools. Above 25, models start to tell tools apart less well.many_tools

Tools

get_game

42 / 100Cloudy

Purpose: 17 / 20
When to use: 0 / 20
Arguments: 10 / 25
Return value: 8 / 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: market_type, full.param_no_description
Minor
No `required` list, so every argument is optional.no_required
Minor
The meaning of the boolean argument full is unclear.vague_boolean

get_instrument

43 / 100Cloudy

Purpose: 17 / 20
When to use: 0 / 20
Arguments: 11 / 25
Return value: 8 / 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: full.param_no_description
Minor
The meaning of the boolean argument full is unclear.vague_boolean
Minor
Required identifiers whose description does not say where the value comes from: ref. Name the tool or the place that returns it, or models look it up first.id_source_missing

get_trader

43 / 100Cloudy

Purpose: 17 / 20
When to use: 0 / 20
Arguments: 11 / 25
Return value: 8 / 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: picks.param_no_description
Minor
No `required` list, so every argument is optional.no_required
Minor
The meaning of the boolean argument picks is unclear.vague_boolean

list_games

43 / 100Cloudy

Purpose: 17 / 20
When to use: 0 / 20
Arguments: 11 / 25
Return value: 8 / 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: full.param_no_description
Minor
No `required` list, so every argument is optional.no_required
Minor
The meaning of the boolean argument full is unclear.vague_boolean

screen_markets

43 / 100Cloudy

Purpose: 14 / 20
When to use: 0 / 20
Arguments: 9 / 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
Major
Arguments without a description: min_volume, max_spread_cents, price_min_cents, price_max_cents, sort, full.param_no_description
Minor
No `required` list, so every argument is optional.no_required
Minor
The meaning of the boolean argument full is unclear.vague_boolean

get_history

45 / 100Cloudy

Purpose: 17 / 20
When to use: 0 / 20
Arguments: 13 / 25
Return value: 8 / 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: window, full.param_no_description
Minor
String arguments with no constraint or example: until, month.loose_string_param
Minor
No `required` list, so every argument is optional.no_required
Minor
The meaning of the boolean argument full is unclear.vague_boolean

search_markets

45 / 100Cloudy

Purpose: 17 / 20
When to use: 0 / 20
Arguments: 8 / 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
Major
Arguments without a description: query, full.param_no_description
Minor
String arguments with no constraint or example: query.loose_string_param
Minor
The description mentions none of its 3 or more arguments.params_not_in_description
Minor
The meaning of the boolean argument full is unclear.vague_boolean

list_markets

46 / 100Cloudy

Purpose: 17 / 20
When to use: 0 / 20
Arguments: 9 / 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
Arguments without a description: sport, full.param_no_description
Minor
String arguments with no constraint or example: sport.loose_string_param
Minor
No `required` list, so every argument is optional.no_required
Minor
The meaning of the boolean argument full is unclear.vague_boolean

get_market

47 / 100Cloudy

Purpose: 17 / 20
When to use: 0 / 20
Arguments: 12 / 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
Arguments without a description: full.param_no_description
Minor
No `required` list, so every argument is optional.no_required
Minor
The meaning of the boolean argument full is unclear.vague_boolean

get_leaderboard

48 / 100Cloudy

Purpose: 17 / 20
When to use: 0 / 20
Arguments: 16 / 25
Return value: 8 / 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: full.param_no_description
Minor
No `required` list, so every argument is optional.no_required
Minor
The meaning of the boolean argument full is unclear.vague_boolean

get_orders

48 / 100Cloudy

Purpose: 17 / 20
When to use: 0 / 20
Arguments: 13 / 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
Arguments without a description: limit.param_no_description
Minor
No `required` list, so every argument is optional.no_required

get_positions

48 / 100Cloudy

Purpose: 20 / 20
When to use: 0 / 20
Arguments: 13 / 25
Return value: 8 / 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: full.param_no_description
Minor
No `required` list, so every argument is optional.no_required
Minor
The meaning of the boolean argument live is unclear.vague_boolean
Minor
The meaning of the boolean argument full is unclear.vague_boolean

get_eval_board

49 / 100Cloudy

Purpose: 17 / 20
When to use: 5 / 20
Arguments: 12 / 25
Return value: 8 / 15
Constraints and side effects: 7 / 10
Examples: 0 / 10

Minor
Arguments without a description: kind, cohort.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

list_perps

49 / 100Cloudy

Purpose: 14 / 20
When to use: 0 / 20
Arguments: 20 / 25
Return value: 8 / 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

get_orderbook

50 / 100Cloudy

Purpose: 17 / 20
When to use: 0 / 20
Arguments: 15 / 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
No `required` list, so every argument is optional.no_required

get_perp_mark

52 / 100Cloudy

Purpose: 14 / 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

get_price_history

52 / 100Cloudy

Purpose: 17 / 20
When to use: 0 / 20
Arguments: 20 / 25
Return value: 8 / 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
Required identifiers whose description does not say where the value comes from: ref. Name the tool or the place that returns it, or models look it up first.id_source_missing

get_track_record

52 / 100Cloudy

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

Minor
Arguments without a description: verify.param_no_description
Minor
No `required` list, so every argument is optional.no_required
Minor
The meaning of the boolean argument verify is unclear.vague_boolean

get_my_stats

57 / 100Cloudy

Purpose: 17 / 20
When to use: 0 / 20
Arguments: 15 / 25
Return value: 15 / 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: by.param_no_description
Minor
String arguments with no constraint or example: until, month.loose_string_param
Minor
No `required` list, so every argument is optional.no_required

get_privacy

57 / 100Cloudy

Purpose: 17 / 20
When to use: 0 / 20
Arguments: 25 / 25
Return value: 8 / 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

cancel_order

60 / 100Cloudy

Purpose: 17 / 20
When to use: 0 / 20
Arguments: 18 / 25
Return value: 15 / 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
String arguments with no constraint or example: order_id.loose_string_param
Minor
The meaning of the boolean argument live is unclear.vague_boolean
Minor
The meaning of the boolean argument confirm is unclear.vague_boolean
Minor
Required identifiers whose description does not say where the value comes from: order_id. Name the tool or the place that returns it, or models look it up first.id_source_missing

get_balance

60 / 100Cloudy

Purpose: 17 / 20
When to use: 0 / 20
Arguments: 25 / 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
The description says the tool is deprecated. Name the replacement, and consider taking the tool out of tools/list: models avoid it when asked for what it does.deprecated

resolve_market

60 / 100Cloudy

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

Minor
Arguments without a description: full.param_no_description
Minor
The description mentions none of its 3 or more arguments.params_not_in_description
Minor
The meaning of the boolean argument full is unclear.vague_boolean

set_privacy

60 / 100Cloudy

Purpose: 17 / 20
When to use: 5 / 20
Arguments: 23 / 25
Return value: 8 / 15
Constraints and side effects: 7 / 10
Examples: 0 / 10

Minor
The meaning of the boolean argument private is unclear.vague_boolean

get_cross_venue_quotes

63 / 100Cloudy

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

Minor
Arguments without a description: full.param_no_description
Minor
The meaning of the boolean argument full is unclear.vague_boolean
Minor
Required identifiers whose description does not say where the value comes from: ref. Name the tool or the place that returns it, or models look it up first.id_source_missing

settle_open

63 / 100Cloudy

Purpose: 17 / 20
When to use: 5 / 20
Arguments: 23 / 25
Return value: 8 / 15
Constraints and side effects: 10 / 10
Examples: 0 / 10

Minor
The meaning of the boolean argument confirm is unclear.vague_boolean

get_perp_history

64 / 100Cloudy

Purpose: 17 / 20
When to use: 0 / 20
Arguments: 19 / 25
Return value: 8 / 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

find_price_gaps

66 / 100Cloudy

Purpose: 20 / 20
When to use: 10 / 20
Arguments: 18 / 25
Return value: 8 / 15
Constraints and side effects: 10 / 10
Examples: 0 / 10

Minor
Arguments without a description: full.param_no_description
Minor
No `required` list, so every argument is optional.no_required
Minor
The meaning of the boolean argument us_only is unclear.vague_boolean
Minor
The meaning of the boolean argument full is unclear.vague_boolean

sell_trade

67 / 100Cloudy

Purpose: 20 / 20
When to use: 15 / 20
Arguments: 14 / 25
Return value: 8 / 15
Constraints and side effects: 10 / 10
Examples: 0 / 10

Minor
Arguments without a description: ticker, side, contracts.param_no_description
Minor
String arguments with no constraint or example: trade_id, ticker, token_id.loose_string_param
Minor
No `required` list, so every argument is optional.no_required
Minor
The meaning of the boolean argument dry_run is unclear.vague_boolean

place_trade

69 / 100Cloudy

Purpose: 20 / 20
When to use: 15 / 20
Arguments: 16 / 25
Return value: 8 / 15
Constraints and side effects: 10 / 10
Examples: 0 / 10

Minor
Arguments without a description: venues.param_no_description
Minor
No `required` list, so every argument is optional.no_required
Minor
The meaning of the boolean argument dry_run is unclear.vague_boolean

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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