Umbra open SAR archive: tool descriptions scored io.github.reesehammer/umbra-mcp

tools/list taken: 2026-11-02 (UTC)
From: Official MCP Registry
Connected to: https://api.umbra-py.space/mcp
Repository: github.com/reesehammer/umbra-py
Scoring rules: v2
Removal: support@forecall.dev

Scores, issues and names only

This page shows how Umbra open SAR archive (io.github.reesehammer/umbra-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.reesehammer/umbra-mcp

Average score: 60.7 / 100Cloudy
Tools: 19
Near-identical descriptions: 0

Across the server

No server-wide issues.

Tools

timescan

42 / 100Cloudy

Purpose: 20 / 20
When to use: 0 / 20
Arguments: 8 / 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: urls, asset, db, max_size.param_no_description
Minor
The meaning of the boolean argument db is unclear.vague_boolean

describe_scene

45 / 100Cloudy

Purpose: 20 / 20
When to use: 0 / 20
Arguments: 6 / 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: url, asset, db, max_size, model, preview.param_no_description
Minor
String arguments with no constraint or example: url.loose_string_param
Minor
The meaning of the boolean argument db is unclear.vague_boolean

narrate_change

47 / 100Cloudy

Purpose: 20 / 20
When to use: 0 / 20
Arguments: 8 / 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: urls, asset, db, max_size, model.param_no_description
Minor
The meaning of the boolean argument db is unclear.vague_boolean

stamp_narration

48 / 100Cloudy

Purpose: 20 / 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: reading, item_ids, asset, model, change_stats.param_no_description

change_composite

49 / 100Cloudy

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

Major
Arguments without a description: urls, asset, db, max_size.param_no_description
Minor
The meaning of the boolean argument db is unclear.vague_boolean

geocode_place

50 / 100Cloudy

Purpose: 20 / 20
When to use: 0 / 20
Arguments: 3 / 25
Return value: 15 / 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.param_no_description
Minor
String arguments with no constraint or example: query.loose_string_param

watch_site

53 / 100Cloudy

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

Major
Arguments without a description: place, area, bbox, fuzzy, start, end, products, name, reset, local.param_no_description
Major
It may be destructive, but destructiveHint is not set.destructive_unmarked
Minor
No `required` list, so every argument is optional.no_required
Minor
The meaning of the boolean argument fuzzy is unclear.vague_boolean
Minor
The meaning of the boolean argument reset is unclear.vague_boolean

download_asset

56 / 100Cloudy

Purpose: 20 / 20
When to use: 10 / 20
Arguments: 6 / 25
Return value: 15 / 15
Constraints and side effects: 0 / 10
Examples: 5 / 10

Major
Arguments without a description: url, asset, dest_dir, confirm.param_no_description
Minor
The description is long (451 words). It helps selection but costs steps and tokens.too_long
Minor
String arguments with no constraint or example: url.loose_string_param
Minor
The meaning of the boolean argument confirm is unclear.vague_boolean
Minor
No constraints, side effects, auth or rate limits described, and no annotations.no_constraints

find_similar_text

60 / 100Cloudy

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

Major
Arguments without a description: query, top_k, min_score, model.param_no_description
Minor
String arguments with no constraint or example: query.loose_string_param

quicklook

60 / 100Cloudy

Purpose: 20 / 20
When to use: 15 / 20
Arguments: 6 / 25
Return value: 7 / 15
Constraints and side effects: 7 / 10
Examples: 5 / 10

Major
Arguments without a description: url, asset, db, max_size, preview.param_no_description
Minor
String arguments with no constraint or example: url.loose_string_param
Minor
The meaning of the boolean argument db is unclear.vague_boolean

find_similar

62 / 100Cloudy

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

Major
Arguments without a description: url, asset, top_k, min_score, model.param_no_description
Minor
String arguments with no constraint or example: url.loose_string_param

index_stats

65 / 100Cloudy

Purpose: 20 / 20
When to use: 0 / 20
Arguments: 25 / 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

stamp_description

65 / 100Cloudy

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

Major
Arguments without a description: reading, item_id, asset, model, image.param_no_description

get_item

73 / 100Clear

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

Major
Arguments without a description: url.param_no_description
Major
The name is made of generic words only.generic_name
Minor
String arguments with no constraint or example: url.loose_string_param

find_repeat_sites

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: bbox, intersects, place, area, fuzzy, start, end, products, polarizations, min_incidence, max_incidence, max_resolution, limit, top, min_passes, rank_by, active_since, active_before, first_since, first_before, max_revisit_days, median_revisit_days, min_span_days, max_span_days, local.param_no_description
Minor
The description is long (1568 words). It helps selection but costs steps and tokens.too_long
Minor
No `required` list, so every argument is optional.no_required
Minor
The meaning of the boolean argument fuzzy is unclear.vague_boolean

pick_change_interval

75 / 100Clear

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

Major
Arguments without a description: urls, asset, max_size, change_threshold_db, extent, crs.param_no_description

search_catalog

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: bbox, intersects, place, area, fuzzy, semantic, min_score, start, end, products, polarizations, min_incidence, max_incidence, max_resolution, canonical, limit, max_per_task, local.param_no_description
Minor
The description is long (518 words). It helps selection but costs steps and tokens.too_long
Minor
No `required` list, so every argument is optional.no_required
Minor
The meaning of the boolean argument fuzzy is unclear.vague_boolean
Minor
The meaning of the boolean argument semantic is unclear.vague_boolean

stack_stats

75 / 100Clear

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

Major
Arguments without a description: urls, asset, bbox, max_size, extent, crs, change_threshold_db, blocks, block_series, speckle_filter, speckle_window.param_no_description
Minor
The description is long (603 words). It helps selection but costs steps and tokens.too_long
Minor
The meaning of the boolean argument block_series is unclear.vague_boolean

stack_provenance

78 / 100Clear

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

Major
Arguments without a description: urls, asset.param_no_description

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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