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io.github.heavyblotto/caelus-mcp: tool descriptions scored

tools/list taken
(UTC)
From
Official MCP Registry
Connected to
https://www.ephemengine.com/api/mcp
Repository
github.com/heavyblotto/caelus
Scoring rules
v2
Removal
support@forecall.dev
Score this URL as it is today

Scores, issues and names only

This page shows how io.github.heavyblotto/caelus-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.heavyblotto/caelus-mcp
Average score
49.0 / 100Cloudy
Tools
35
Near-identical descriptions
0

Across the server

  • Minor
    35 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

synthetic_sky_view

33 / 100Rain

Purpose
17 / 20
When to use
0 / 20
Arguments
8 / 25
Return value
0 / 15
Constraints and side effects
3 / 10
Examples
5 / 10
  • Major
    Says nothing about when to use it, or when not to.no_usage_context
  • Major
    Arguments without a description: system, system.id, system.bodies, system.bodies[].id, system.bodies[].mode, system.bodies[].lonDeg, system.bodies[].id, system.bodies[].mode, system.bodies[].periodDays, system.bodies[].phaseDeg, system.bodies[].epoch, system.bodies[].id, system.bodies[].mode, system.bodies[].a, system.bodies[].e, system.bodies[].i, system.bodies[].node, system.bodies[].peri, system.bodies[].M0, system.bodies[].periodDays, system.bodies[].epoch, system.observer, system.render, lens, width, height, bortle.param_no_description
  • Minor
    String arguments with no constraint or example: system.id, system.bodies[].id, system.bodies[].mode, system.bodies[].id, system.bodies[].mode, system.bodies[].id, system.bodies[].mode, system.observer.loose_string_param
  • Minor
    Says nothing about what it returns.no_return_info

composite

40 / 100Cloudy

Purpose
17 / 20
When to use
0 / 20
Arguments
18 / 25
Return value
0 / 15
Constraints and side effects
0 / 10
Examples
5 / 10
  • Major
    Says nothing about when to use it, or when not to.no_usage_context
  • Minor
    Arguments without a description: b.date, b.lat, b.lon.param_no_description
  • Minor
    Says nothing about what it returns.no_return_info
  • Minor
    No constraints, side effects, auth or rate limits described, and no annotations.no_constraints

synthetic_validate

40 / 100Cloudy

Purpose
20 / 20
When to use
0 / 20
Arguments
5 / 25
Return value
7 / 15
Constraints and side effects
3 / 10
Examples
5 / 10
  • Major
    Says nothing about when to use it, or when not to.no_usage_context
  • Major
    Arguments without a description: system, system.id, system.bodies, system.bodies[].id, system.bodies[].mode, system.bodies[].lonDeg, system.bodies[].id, system.bodies[].mode, system.bodies[].periodDays, system.bodies[].phaseDeg, system.bodies[].epoch, system.bodies[].id, system.bodies[].mode, system.bodies[].a, system.bodies[].e, system.bodies[].i, system.bodies[].node, system.bodies[].peri, system.bodies[].M0, system.bodies[].periodDays, system.bodies[].epoch, system.observer, system.render.param_no_description
  • Minor
    String arguments with no constraint or example: system.id, system.bodies[].id, system.bodies[].mode, system.bodies[].id, system.bodies[].mode, system.bodies[].id, system.bodies[].mode, system.observer.loose_string_param

transits

41 / 100Cloudy

Purpose
14 / 20
When to use
0 / 20
Arguments
22 / 25
Return value
0 / 15
Constraints and side effects
0 / 10
Examples
5 / 10
  • Major
    Says nothing about when to use it, or when not to.no_usage_context
  • Minor
    Says nothing about what it returns.no_return_info
  • Minor
    No constraints, side effects, auth or rate limits described, and no annotations.no_constraints

find_aspect_dates

43 / 100Cloudy

Purpose
17 / 20
When to use
0 / 20
Arguments
21 / 25
Return value
0 / 15
Constraints and side effects
0 / 10
Examples
5 / 10
  • Major
    Says nothing about when to use it, or when not to.no_usage_context
  • Minor
    Arguments without a description: aspect.param_no_description
  • Minor
    Says nothing about what it returns.no_return_info
  • Minor
    No constraints, side effects, auth or rate limits described, and no annotations.no_constraints

synthetic_positions

43 / 100Cloudy

Purpose
17 / 20
When to use
5 / 20
Arguments
6 / 25
Return value
7 / 15
Constraints and side effects
3 / 10
Examples
5 / 10
  • Major
    Arguments without a description: system, system.id, system.bodies, system.bodies[].id, system.bodies[].mode, system.bodies[].lonDeg, system.bodies[].id, system.bodies[].mode, system.bodies[].periodDays, system.bodies[].phaseDeg, system.bodies[].epoch, system.bodies[].id, system.bodies[].mode, system.bodies[].a, system.bodies[].e, system.bodies[].i, system.bodies[].node, system.bodies[].peri, system.bodies[].M0, system.bodies[].periodDays, system.bodies[].epoch, system.observer, system.render.param_no_description
  • Minor
    String arguments with no constraint or example: system.id, system.bodies[].id, system.bodies[].mode, system.bodies[].id, system.bodies[].mode, system.bodies[].id, system.bodies[].mode, system.observer.loose_string_param

cosmic_weather

44 / 100Cloudy

Purpose
17 / 20
When to use
0 / 20
Arguments
22 / 25
Return value
0 / 15
Constraints and side effects
0 / 10
Examples
5 / 10
  • Major
    Says nothing about when to use it, or when not to.no_usage_context
  • Minor
    String arguments with no constraint or example: date.loose_string_param
  • Minor
    Says nothing about what it returns.no_return_info
  • Minor
    No constraints, side effects, auth or rate limits described, and no annotations.no_constraints

nakshatras

44 / 100Cloudy

Purpose
17 / 20
When to use
0 / 20
Arguments
22 / 25
Return value
0 / 15
Constraints and side effects
0 / 10
Examples
5 / 10
  • Major
    Says nothing about when to use it, or when not to.no_usage_context
  • Minor
    Says nothing about what it returns.no_return_info
  • Minor
    No constraints, side effects, auth or rate limits described, and no annotations.no_constraints

parans

44 / 100Cloudy

Purpose
17 / 20
When to use
0 / 20
Arguments
22 / 25
Return value
0 / 15
Constraints and side effects
0 / 10
Examples
5 / 10
  • Major
    Says nothing about when to use it, or when not to.no_usage_context
  • Minor
    Says nothing about what it returns.no_return_info
  • Minor
    No constraints, side effects, auth or rate limits described, and no annotations.no_constraints

yogas

44 / 100Cloudy

Purpose
17 / 20
When to use
0 / 20
Arguments
22 / 25
Return value
0 / 15
Constraints and side effects
0 / 10
Examples
5 / 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
    Says nothing about what it returns.no_return_info
  • Minor
    No constraints, side effects, auth or rate limits described, and no annotations.no_constraints

aspect_patterns

45 / 100Cloudy

Purpose
17 / 20
When to use
0 / 20
Arguments
23 / 25
Return value
0 / 15
Constraints and side effects
0 / 10
Examples
5 / 10
  • Major
    Says nothing about when to use it, or when not to.no_usage_context
  • Minor
    Says nothing about what it returns.no_return_info
  • Minor
    No constraints, side effects, auth or rate limits described, and no annotations.no_constraints

chart_signature

45 / 100Cloudy

Purpose
17 / 20
When to use
0 / 20
Arguments
23 / 25
Return value
0 / 15
Constraints and side effects
0 / 10
Examples
5 / 10
  • Major
    Says nothing about when to use it, or when not to.no_usage_context
  • Minor
    Says nothing about what it returns.no_return_info
  • Minor
    No constraints, side effects, auth or rate limits described, and no annotations.no_constraints

rectification_grid

47 / 100Cloudy

Purpose
17 / 20
When to use
10 / 20
Arguments
20 / 25
Return value
0 / 15
Constraints and side effects
0 / 10
Examples
0 / 10
  • Minor
    Says nothing about what it returns.no_return_info
  • Minor
    No constraints, side effects, auth or rate limits described, and no annotations.no_constraints

sky_events

47 / 100Cloudy

Purpose
17 / 20
When to use
0 / 20
Arguments
22 / 25
Return value
0 / 15
Constraints and side effects
3 / 10
Examples
5 / 10
  • Major
    Says nothing about when to use it, or when not to.no_usage_context
  • Minor
    Says nothing about what it returns.no_return_info

electional_search

48 / 100Cloudy

Purpose
20 / 20
When to use
0 / 20
Arguments
21 / 25
Return value
7 / 15
Constraints and side effects
0 / 10
Examples
0 / 10
  • Major
    Says nothing about when to use it, or when not to.no_usage_context
  • Minor
    Arguments without a description: wanted[].aspect.param_no_description
  • Minor
    String arguments with no constraint or example: wanted[].a, wanted[].b.loose_string_param
  • Minor
    No constraints, side effects, auth or rate limits described, and no annotations.no_constraints

void_of_course

48 / 100Cloudy

Purpose
17 / 20
When to use
5 / 20
Arguments
19 / 25
Return value
7 / 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

dignities

49 / 100Cloudy

Purpose
17 / 20
When to use
5 / 20
Arguments
22 / 25
Return value
0 / 15
Constraints and side effects
0 / 10
Examples
5 / 10
  • Minor
    Says nothing about what it returns.no_return_info
  • Minor
    No constraints, side effects, auth or rate limits described, and no annotations.no_constraints

lots

49 / 100Cloudy

Purpose
17 / 20
When to use
5 / 20
Arguments
22 / 25
Return value
0 / 15
Constraints and side effects
0 / 10
Examples
5 / 10
  • Minor
    Says nothing about what it returns.no_return_info
  • Minor
    No constraints, side effects, auth or rate limits described, and no annotations.no_constraints

planetary_hours

49 / 100Cloudy

Purpose
17 / 20
When to use
5 / 20
Arguments
20 / 25
Return value
7 / 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

sky_view

49 / 100Cloudy

Purpose
17 / 20
When to use
0 / 20
Arguments
22 / 25
Return value
0 / 15
Constraints and side effects
0 / 10
Examples
10 / 10
  • Major
    Says nothing about when to use it, or when not to.no_usage_context
  • Minor
    Says nothing about what it returns.no_return_info
  • Minor
    No constraints, side effects, auth or rate limits described, and no annotations.no_constraints

vargas

49 / 100Cloudy

Purpose
17 / 20
When to use
5 / 20
Arguments
22 / 25
Return value
0 / 15
Constraints and side effects
0 / 10
Examples
5 / 10
  • 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
  • Minor
    No constraints, side effects, auth or rate limits described, and no annotations.no_constraints

directions

51 / 100Cloudy

Purpose
17 / 20
When to use
0 / 20
Arguments
22 / 25
Return value
7 / 15
Constraints and side effects
0 / 10
Examples
5 / 10
  • Major
    Says nothing about when to use it, or when not to.no_usage_context
  • Minor
    No constraints, side effects, auth or rate limits described, and no annotations.no_constraints

profections

51 / 100Cloudy

Purpose
17 / 20
When to use
0 / 20
Arguments
22 / 25
Return value
7 / 15
Constraints and side effects
0 / 10
Examples
5 / 10
  • Major
    Says nothing about when to use it, or when not to.no_usage_context
  • Minor
    No constraints, side effects, auth or rate limits described, and no annotations.no_constraints

progressions

51 / 100Cloudy

Purpose
17 / 20
When to use
0 / 20
Arguments
22 / 25
Return value
7 / 15
Constraints and side effects
0 / 10
Examples
5 / 10
  • Major
    Says nothing about when to use it, or when not to.no_usage_context
  • Minor
    No constraints, side effects, auth or rate limits described, and no annotations.no_constraints

returns

52 / 100Cloudy

Purpose
17 / 20
When to use
0 / 20
Arguments
23 / 25
Return value
7 / 15
Constraints and side effects
0 / 10
Examples
5 / 10
  • Major
    Says nothing about when to use it, or when not to.no_usage_context
  • Minor
    No constraints, side effects, auth or rate limits described, and no annotations.no_constraints

synastry

52 / 100Cloudy

Purpose
20 / 20
When to use
5 / 20
Arguments
17 / 25
Return value
0 / 15
Constraints and side effects
0 / 10
Examples
10 / 10
  • Minor
    Arguments without a description: b.date, b.lat, b.lon.param_no_description
  • Minor
    Says nothing about what it returns.no_return_info
  • Minor
    No constraints, side effects, auth or rate limits described, and no annotations.no_constraints

chart_facts

53 / 100Cloudy

Purpose
17 / 20
When to use
10 / 20
Arguments
9 / 25
Return value
7 / 15
Constraints and side effects
0 / 10
Examples
10 / 10
  • Major
    Arguments without a description: constraints[].kind, constraints[].a, constraints[].b, constraints[].angle, constraints[].weight, constraints[].kind, constraints[].body, constraints[].sign, constraints[].weight, constraints[].kind, constraints[].body, constraints[].degree, constraints[].weight, constraints[].kind, constraints[].body, constraints[].degree, constraints[].weight, constraints[].kind, constraints[].a, constraints[].b, constraints[].contra, constraints[].weight, constraints[].kind, constraints[].a, constraints[].b, constraints[].angle, constraints[].weight.param_no_description
  • Minor
    String arguments with no constraint or example: constraints[].kind, constraints[].a, constraints[].b, constraints[].kind, constraints[].body, constraints[].kind, constraints[].body, constraints[].kind, constraints[].body, constraints[].kind, constraints[].a, constraints[].b, constraints[].kind, constraints[].a, constraints[].b.loose_string_param
  • Minor
    No `required` list, so every argument is optional.no_required
  • Minor
    The meaning of the boolean argument constraints[].contra is unclear.vague_boolean
  • Minor
    No constraints, side effects, auth or rate limits described, and no annotations.no_constraints

firdaria

54 / 100Cloudy

Purpose
17 / 20
When to use
5 / 20
Arguments
20 / 25
Return value
7 / 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

counterfactual_chart

56 / 100Cloudy

Purpose
17 / 20
When to use
0 / 20
Arguments
22 / 25
Return value
7 / 15
Constraints and side effects
0 / 10
Examples
10 / 10
  • Major
    Says nothing about when to use it, or when not to.no_usage_context
  • Minor
    No constraints, side effects, auth or rate limits described, and no annotations.no_constraints

dasha

56 / 100Cloudy

Purpose
17 / 20
When to use
5 / 20
Arguments
22 / 25
Return value
7 / 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

releasing

56 / 100Cloudy

Purpose
17 / 20
When to use
5 / 20
Arguments
22 / 25
Return value
7 / 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

similar_skies

57 / 100Cloudy

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

sky_view_sequence

57 / 100Cloudy

Purpose
17 / 20
When to use
5 / 20
Arguments
18 / 25
Return value
7 / 15
Constraints and side effects
0 / 10
Examples
10 / 10
  • Minor
    Arguments without a description: lens, width, height.param_no_description
  • Minor
    No constraints, side effects, auth or rate limits described, and no annotations.no_constraints

natal_chart

58 / 100Cloudy

Purpose
17 / 20
When to use
5 / 20
Arguments
24 / 25
Return value
7 / 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

current_sky

70 / 100Clear

Purpose
17 / 20
When to use
15 / 20
Arguments
21 / 25
Return value
7 / 15
Constraints and side effects
0 / 10
Examples
10 / 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

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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