chucho — Book Direct: tool descriptions scored io.github.chucho-ai/chucho

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

Scores, issues and names only

This page shows how chucho — Book Direct (io.github.chucho-ai/chucho)'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.chucho-ai/chucho

Average score: 67.5 / 100Cloudy
Tools: 18
Near-identical descriptions: 0

Across the server

Major
10 tools repeat the same note (86 words). Say it once in the server's instructions, and let each description say what only that tool does. The note does not count toward the tools' scores.repeated_note
Minor
The server's instructions are 10200 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

search_property_mentions

41 / 100Cloudy

Purpose: 17 / 20
When to use: 0 / 20
Arguments: 10 / 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
Major
Arguments without a description: query.param_no_description

record_property_event

47 / 100Cloudy

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

Major
Arguments without a description: id, type, sessionId, locale.param_no_description
Minor
Required identifiers whose description does not say where the value comes from: id, sessionId. Name the tool or the place that returns it, or models look it up first.id_source_missing

open_shortlist

48 / 100Cloudy

Purpose: 17 / 20
When to use: 0 / 20
Arguments: 19 / 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: locale, arrival, departure, minBedrooms, minBathrooms, pool, page.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

prepare_enquiry

48 / 100Cloudy

Purpose: 20 / 20
When to use: 0 / 20
Arguments: 10 / 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
Major
Arguments without a description: revision, locale, answers, idempotencyKey, id.param_no_description
Minor
Required identifiers whose description does not say where the value comes from: id. Name the tool or the place that returns it, or models look it up first.id_source_missing

get_stay_areas

55 / 100Cloudy

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

Minor
Arguments without a description: locale.param_no_description
Minor
No `required` list, so every argument is optional.no_required

get_filters

62 / 100Cloudy

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

Minor
Arguments without a description: locale, page.param_no_description
Minor
No `required` list, so every argument is optional.no_required

search_nearby_properties

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

Minor
Arguments without a description: locale, minBedrooms, minBathrooms, pool, page.param_no_description

submit_enquiry

65 / 100Cloudy

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

Major
Arguments without a description: approvalToken, guestApproved, idempotencyKey, id.param_no_description
Minor
The meaning of the boolean argument guestApproved is unclear.vague_boolean

get_property

67 / 100Cloudy

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

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

get_booking_link

68 / 100Cloudy

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

Minor
Arguments without a description: id, locale.param_no_description
Minor
Required identifiers whose description does not say where the value comes from: id. Name the tool or the place that returns it, or models look it up first.id_source_missing

render_properties

71 / 100Clear

Purpose: 20 / 20
When to use: 10 / 20
Arguments: 21 / 25
Return value: 8 / 15
Constraints and side effects: 7 / 10
Examples: 5 / 10

Minor
Arguments without a description: ids, locale, searchContext.locale, searchContext.arrival, searchContext.departure, searchContext.minBedrooms, searchContext.minBathrooms, searchContext.pool, searchContext.page.param_no_description

get_enquiry_form

73 / 100Clear

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

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

explore_nearby

77 / 100Clear

Purpose: 20 / 20
When to use: 20 / 20
Arguments: 22 / 25
Return value: 0 / 15
Constraints and side effects: 10 / 10
Examples: 5 / 10

Minor
Arguments without a description: themes, locale.param_no_description
Minor
Says nothing about what it returns.no_return_info

inspect_travel_video

77 / 100Clear

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

Minor
Arguments without a description: locale.param_no_description

get_stay_quote

85 / 100Clear

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

Minor
Arguments without a description: id, arrival, departure, guests.param_no_description
Minor
Required identifiers whose description does not say where the value comes from: id. Name the tool or the place that returns it, or models look it up first.id_source_missing

open_explorer

86 / 100Clear

Purpose: 20 / 20
When to use: 20 / 20
Arguments: 19 / 25
Return value: 7 / 15
Constraints and side effects: 10 / 10
Examples: 10 / 10

Minor
The description is long (663 words). It helps selection but costs steps and tokens.too_long
Minor
Arguments without a description: locale, arrival, departure, minBedrooms, minBathrooms, pool, page.param_no_description
Minor
No `required` list, so every argument is optional.no_required

get_stay_estimate

88 / 100Clear

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

Major
Arguments without a description: id, windowStart, windowEnd, nights, guests.param_no_description

search_properties

94 / 100Clear

Purpose: 20 / 20
When to use: 20 / 20
Arguments: 19 / 25
Return value: 15 / 15
Constraints and side effects: 10 / 10
Examples: 10 / 10

Minor
The description is long (1330 words). It helps selection but costs steps and tokens.too_long
Minor
Arguments without a description: locale, arrival, departure, minBedrooms, minBathrooms, pool, page.param_no_description
Minor
No `required` list, so every argument is optional.no_required

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