io.github.eidetic-works/nucleus: tool descriptions scored

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

Scores, issues and names only

This page shows how io.github.eidetic-works/nucleus'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.eidetic-works/nucleus

Average score: 55.0 / 100Cloudy
Tools: 28
Near-identical descriptions: 0

Across the server

Minor
28 tools. Above 25, models start to tell tools apart less well.many_tools
Minor
The server has no instructions. Say there, once, what the server is for and when to use it: Claude Code and Gemini CLI read the instructions before the tool descriptions.instructions_missing

Tools

nucleus_federation

37 / 100Rain

Purpose: 17 / 20
When to use: 0 / 20
Arguments: 5 / 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
Major
Arguments without a description: action, params.param_no_description
Minor
String arguments with no constraint or example: action.loose_string_param

nucleus_orchestration

37 / 100Rain

Purpose: 17 / 20
When to use: 0 / 20
Arguments: 5 / 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
Major
Arguments without a description: action, params.param_no_description
Minor
String arguments with no constraint or example: action.loose_string_param

nucleus_slots

37 / 100Rain

Purpose: 17 / 20
When to use: 0 / 20
Arguments: 5 / 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
Major
Arguments without a description: action, params.param_no_description
Minor
String arguments with no constraint or example: action.loose_string_param

nucleus_infra

40 / 100Cloudy

Purpose: 17 / 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: action, params.param_no_description
Minor
String arguments with no constraint or example: action.loose_string_param

nucleus_telemetry

40 / 100Cloudy

Purpose: 17 / 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: action, params.param_no_description
Minor
String arguments with no constraint or example: action.loose_string_param

nucleus_sync

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: action, params.param_no_description
Minor
The description is long (527 words). It helps selection but costs steps and tokens.too_long
Minor
String arguments with no constraint or example: action.loose_string_param

nucleus_features

44 / 100Cloudy

Purpose: 17 / 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: action, params.param_no_description
Minor
String arguments with no constraint or example: action.loose_string_param

nucleus_tasks

45 / 100Cloudy

Purpose: 17 / 20
When to use: 0 / 20
Arguments: 5 / 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
Major
Arguments without a description: action, params.param_no_description
Minor
String arguments with no constraint or example: action.loose_string_param

nucleus_governance

47 / 100Cloudy

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

Major
Arguments without a description: action, params.param_no_description
Minor
String arguments with no constraint or example: action.loose_string_param

nucleus_agents

50 / 100Cloudy

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

Major
Arguments without a description: action, params.param_no_description
Minor
String arguments with no constraint or example: action.loose_string_param

nucleus_audit

50 / 100Cloudy

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

Major
Arguments without a description: action, params.param_no_description
Minor
String arguments with no constraint or example: action.loose_string_param

nucleus_sessions

50 / 100Cloudy

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

Major
Arguments without a description: action, params.param_no_description
Minor
String arguments with no constraint or example: action.loose_string_param

nucleus_engrams

52 / 100Cloudy

Purpose: 17 / 20
When to use: 0 / 20
Arguments: 5 / 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
Major
Arguments without a description: action, params.param_no_description
Minor
String arguments with no constraint or example: action.loose_string_param

nucleus_lane_stop

52 / 100Cloudy

Purpose: 17 / 20
When to use: 5 / 20
Arguments: 22 / 25
Return value: 8 / 15
Constraints and side effects: 0 / 10
Examples: 0 / 10

Minor
No `required` list, so every argument is optional.no_required
Minor
No constraints, side effects, auth or rate limits described, and no annotations.no_constraints

nucleus_route

52 / 100Cloudy

Purpose: 17 / 20
When to use: 0 / 20
Arguments: 5 / 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
Major
Arguments without a description: action, params.param_no_description
Minor
String arguments with no constraint or example: action.loose_string_param

nucleus_plan_import

58 / 100Cloudy

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

Minor
No constraints, side effects, auth or rate limits described, and no annotations.no_constraints

nucleus_lane_init

60 / 100Cloudy

Purpose: 20 / 20
When to use: 10 / 20
Arguments: 22 / 25
Return value: 8 / 15
Constraints and side effects: 0 / 10
Examples: 0 / 10

Minor
No `required` list, so every argument is optional.no_required
Minor
No constraints, side effects, auth or rate limits described, and no annotations.no_constraints

nucleus_lane_status

60 / 100Cloudy

Purpose: 20 / 20
When to use: 10 / 20
Arguments: 22 / 25
Return value: 8 / 15
Constraints and side effects: 0 / 10
Examples: 0 / 10

Minor
No `required` list, so every argument is optional.no_required
Minor
No constraints, side effects, auth or rate limits described, and no annotations.no_constraints

nucleus_next_message

62 / 100Cloudy

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

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

nucleus_plan_execute

62 / 100Cloudy

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

Minor
The description mentions none of its 3 or more arguments.params_not_in_description
Minor
No constraints, side effects, auth or rate limits described, and no annotations.no_constraints

nucleus_relay

62 / 100Cloudy

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

Major
Arguments without a description: action, params.param_no_description
Minor
String arguments with no constraint or example: action.loose_string_param

nucleus_ccr_arm

67 / 100Cloudy

Purpose: 17 / 20
When to use: 5 / 20
Arguments: 22 / 25
Return value: 8 / 15
Constraints and side effects: 10 / 10
Examples: 5 / 10

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

nucleus_lane_feedback

68 / 100Cloudy

Purpose: 20 / 20
When to use: 10 / 20
Arguments: 22 / 25
Return value: 8 / 15
Constraints and side effects: 3 / 10
Examples: 5 / 10

Minor
String arguments with no constraint or example: subject, body.loose_string_param
Minor
The description mentions none of its 3 or more arguments.params_not_in_description

nucleus_plan_list

70 / 100Clear

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

Minor
No constraints, side effects, auth or rate limits described, and no annotations.no_constraints

nucleus_lane_start

72 / 100Clear

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

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
The meaning of the boolean argument no_watcher is unclear.vague_boolean
Minor
No constraints, side effects, auth or rate limits described, and no annotations.no_constraints

nucleus_relay_subscribe

74 / 100Clear

Purpose: 17 / 20
When to use: 10 / 20
Arguments: 22 / 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

nucleus_wakeup_wait

74 / 100Clear

Purpose: 17 / 20
When to use: 10 / 20
Arguments: 22 / 25
Return value: 15 / 15
Constraints and side effects: 10 / 10
Examples: 0 / 10

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

nucleus_delegate

75 / 100Clear

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

Major
Arguments without a description: action, params.param_no_description
Minor
The description is long (657 words). It helps selection but costs steps and tokens.too_long
Minor
String arguments with no constraint or example: action.loose_string_param

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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