Istanbul MCP: tool descriptions scored io.github.Batu1-1an/istanbul-mcp

tools/list taken: 2026-11-02 (UTC)
From: Official MCP Registry
Connected to: https://istanbulmcp-production.up.railway.app/mcp/
Homepage: github.com/Batu1-1an/istanbulmcp
Repository: github.com/Batu1-1an/istanbulmcp
Scoring rules: v2
Removal: support@forecall.dev

Scores, issues and names only

This page shows how Istanbul MCP (io.github.Batu1-1an/istanbul-mcp)'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.Batu1-1an/istanbul-mcp

Average score: 42.2 / 100Cloudy
Tools: 18
Near-identical descriptions: 0

Across the server

Minor
The server's instructions are 3087 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

istanbul_search_datasets

23 / 100Rain

Purpose: 13 / 20
When to use: 0 / 20
Arguments: 3 / 25
Return value: 0 / 15
Constraints and side effects: 7 / 10
Examples: 0 / 10

Major
The description is too short (6 words).too_short
Major
Says nothing about when to use it, or when not to.no_usage_context
Major
Arguments without a description: query, formats, limit.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
Says nothing about what it returns.no_return_info

istanbul_get_dataset

30 / 100Rain

Purpose: 13 / 20
When to use: 0 / 20
Arguments: 3 / 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: dataset_id.param_no_description
Minor
String arguments with no constraint or example: dataset_id.loose_string_param
Minor
Required identifiers whose description does not say where the value comes from: dataset_id. Name the tool or the place that returns it, or models look it up first.id_source_missing

istanbul_get_resource_schema

30 / 100Rain

Purpose: 13 / 20
When to use: 0 / 20
Arguments: 3 / 25
Return value: 7 / 15
Constraints and side effects: 7 / 10
Examples: 0 / 10

Major
The description is too short (7 words).too_short
Major
Says nothing about when to use it, or when not to.no_usage_context
Major
Arguments without a description: resource_id.param_no_description
Minor
String arguments with no constraint or example: resource_id.loose_string_param
Minor
Required identifiers whose description does not say where the value comes from: resource_id. Name the tool or the place that returns it, or models look it up first.id_source_missing

istanbul_query_resource

30 / 100Rain

Purpose: 20 / 20
When to use: 0 / 20
Arguments: 3 / 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: resource_id, filters, limit.param_no_description
Minor
String arguments with no constraint or example: resource_id.loose_string_param
Minor
Says nothing about what it returns.no_return_info

istanbul_neighborhood_profile

34 / 100Rain

Purpose: 17 / 20
When to use: 0 / 20
Arguments: 3 / 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: district, neighborhood, limit.param_no_description
Minor
String arguments with no constraint or example: district.loose_string_param

istanbul_metro_accessibility_status

39 / 100Rain

Purpose: 20 / 20
When to use: 0 / 20
Arguments: 5 / 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: line, station, equipment_type, limit.param_no_description
Minor
No `required` list, so every argument is optional.no_required

istanbul_transport_disruptions

40 / 100Cloudy

Purpose: 13 / 20
When to use: 0 / 20
Arguments: 5 / 25
Return value: 15 / 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: mode, operator, line, limit.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

istanbul_transit_line

43 / 100Cloudy

Purpose: 20 / 20
When to use: 0 / 20
Arguments: 5 / 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: line_code, action, limit.param_no_description
Minor
String arguments with no constraint or example: line_code.loose_string_param

istanbul_city_services_nearby

44 / 100Cloudy

Purpose: 20 / 20
When to use: 0 / 20
Arguments: 5 / 25
Return value: 7 / 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: place, lat, lon, radius_m, limit, district.param_no_description
Minor
No `required` list, so every argument is optional.no_required

istanbul_mobility_nearby

44 / 100Cloudy

Purpose: 20 / 20
When to use: 0 / 20
Arguments: 5 / 25
Return value: 7 / 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: place, lat, lon, radius_m, limit, district.param_no_description
Minor
No `required` list, so every argument is optional.no_required

istanbul_datastore_query

45 / 100Cloudy

Purpose: 20 / 20
When to use: 5 / 20
Arguments: 3 / 25
Return value: 7 / 15
Constraints and side effects: 10 / 10
Examples: 0 / 10

Major
Arguments without a description: resource_id, sql, limit.param_no_description
Minor
String arguments with no constraint or example: resource_id, sql.loose_string_param
Minor
Required identifiers whose description does not say where the value comes from: resource_id. Name the tool or the place that returns it, or models look it up first.id_source_missing

istanbul_health

45 / 100Cloudy

Purpose: 6 / 20
When to use: 0 / 20
Arguments: 25 / 25
Return value: 7 / 15
Constraints and side effects: 7 / 10
Examples: 0 / 10

Major
The description only restates the name (5 words).restates_name
Major
The description is too short (5 words).too_short
Major
Says nothing about when to use it, or when not to.no_usage_context

istanbul_water_status

45 / 100Cloudy

Purpose: 20 / 20
When to use: 0 / 20
Arguments: 5 / 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: kind, district, fault_number, dam_name, min_occupancy, limit.param_no_description
Minor
No `required` list, so every argument is optional.no_required

istanbul_market_schedule

47 / 100Cloudy

Purpose: 20 / 20
When to use: 0 / 20
Arguments: 5 / 25
Return value: 15 / 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: district, day, limit.param_no_description
Minor
No `required` list, so every argument is optional.no_required

istanbul_nearby

47 / 100Cloudy

Purpose: 20 / 20
When to use: 0 / 20
Arguments: 5 / 25
Return value: 15 / 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: lat, lon, types, radius_m, limit, kind, district, bbox.param_no_description
Minor
No `required` list, so every argument is optional.no_required

istanbul_traffic_status

53 / 100Cloudy

Purpose: 6 / 20
When to use: 0 / 20
Arguments: 25 / 25
Return value: 15 / 15
Constraints and side effects: 7 / 10
Examples: 0 / 10

Major
The description only restates the name (5 words).restates_name
Major
The description is too short (5 words).too_short
Major
Says nothing about when to use it, or when not to.no_usage_context

istanbul_gtfs_snapshot_status

60 / 100Cloudy

Purpose: 20 / 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

istanbul_next_departures

60 / 100Cloudy

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

Major
Arguments without a description: stop_id, lat, lon, line, at, radius_m, limit, stop_query.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.

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