Instavar Video Templates and Studio: tool descriptions scored com.instavar/mcp-server

tools/list taken: 2026-11-02 (UTC)
From: Official MCP Registry
Connected to: https://instavar.com/api/mcp/templates
Homepage: instavar.com/remotion
Repository: github.com/instavar/mcp-server
Scoring rules: v2
Removal: support@forecall.dev

Scores, issues and names only

This page shows how Instavar Video Templates and Studio (com.instavar/mcp-server)'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/com.instavar/mcp-server

Average score: 54.7 / 100Cloudy
Tools: 20
Near-identical descriptions: 0

Across the server

Minor
The server's instructions are 3688 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

list_carousel_templates

38 / 100Rain

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

Major
The description only restates the name (7 words).restates_name
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
Minor
Says nothing about what it returns.no_return_info

get_carousel_schema

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 (9 words).restates_name
Major
Says nothing about when to use it, or when not to.no_usage_context

prepare_announcement

47 / 100Cloudy

Purpose: 17 / 20
When to use: 5 / 20
Arguments: 11 / 25
Return value: 7 / 15
Constraints and side effects: 7 / 10
Examples: 0 / 10

Major
Arguments without a description: copy.title, copy.body, copy.cta, project.templateId, project.framework, project.revision, project.copy, edits.title, edits.body, edits.cta.param_no_description
Minor
String arguments with no constraint or example: project.templateId.loose_string_param
Minor
No `required` list, so every argument is optional.no_required

get_render_instructions

49 / 100Cloudy

Purpose: 13 / 20
When to use: 0 / 20
Arguments: 22 / 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
Minor
No `required` list, so every argument is optional.no_required

scaffold_carousel_deck

49 / 100Cloudy

Purpose: 17 / 20
When to use: 0 / 20
Arguments: 25 / 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
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
Required identifiers whose description does not say where the value comes from: templateId. Name the tool or the place that returns it, or models look it up first.id_source_missing

get_example

50 / 100Cloudy

Purpose: 6 / 20
When to use: 0 / 20
Arguments: 25 / 25
Return value: 7 / 15
Constraints and side effects: 7 / 10
Examples: 5 / 10

Major
The description only restates the name (9 words).restates_name
Major
Says nothing about when to use it, or when not to.no_usage_context
Minor
Required identifiers whose description does not say where the value comes from: templateId. Name the tool or the place that returns it, or models look it up first.id_source_missing

scaffold_video_spec

50 / 100Cloudy

Purpose: 17 / 20
When to use: 0 / 20
Arguments: 19 / 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
Minor
Arguments without a description: acceptedDesign.style, acceptedDesign.durationSeconds, acceptedDesign.audio, acceptedDesign.illustration, acceptedDesign.exclusions, acceptedDesign.preview.param_no_description
Minor
String arguments with no constraint or example: acceptedDesign.preview.loose_string_param
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: templateId. Name the tool or the place that returns it, or models look it up first.id_source_missing

propose_video_storyboard

51 / 100Cloudy

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

Minor
Arguments without a description: acceptedDesign.style, acceptedDesign.durationSeconds, acceptedDesign.audio, acceptedDesign.illustration, acceptedDesign.exclusions, acceptedDesign.preview.param_no_description
Minor
String arguments with no constraint or example: acceptedDesign.preview.loose_string_param
Minor
Says nothing about what it returns.no_return_info

get_capabilities

52 / 100Cloudy

Purpose: 17 / 20
When to use: 0 / 20
Arguments: 25 / 25
Return value: 0 / 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
Minor
Says nothing about what it returns.no_return_info

get_video_schema

52 / 100Cloudy

Purpose: 13 / 20
When to use: 0 / 20
Arguments: 25 / 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

list_templates

53 / 100Cloudy

Purpose: 17 / 20
When to use: 0 / 20
Arguments: 22 / 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
Minor
No `required` list, so every argument is optional.no_required

get_template

54 / 100Cloudy

Purpose: 17 / 20
When to use: 0 / 20
Arguments: 25 / 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
Says nothing about what it returns.no_return_info
Minor
Required identifiers whose description does not say where the value comes from: templateId. Name the tool or the place that returns it, or models look it up first.id_source_missing

diagnose_render_error

56 / 100Cloudy

Purpose: 17 / 20
When to use: 0 / 20
Arguments: 25 / 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

get_creative_guide

56 / 100Cloudy

Purpose: 20 / 20
When to use: 0 / 20
Arguments: 22 / 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
Minor
No `required` list, so every argument is optional.no_required

prepare_video_template

57 / 100Cloudy

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

Minor
Arguments without a description: project.contract, project.framework, project.spec.param_no_description
Minor
String arguments with no constraint or example: project.contract.loose_string_param
Minor
No `required` list, so every argument is optional.no_required

review_video_project

62 / 100Cloudy

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

Minor
Required identifiers whose description does not say where the value comes from: jobId. Name the tool or the place that returns it, or models look it up first.id_source_missing

edit_video_brief

64 / 100Cloudy

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

Minor
Required identifiers whose description does not say where the value comes from: jobId, requestId. Name the tool or the place that returns it, or models look it up first.id_source_missing

create_video_brief

66 / 100Cloudy

Purpose: 20 / 20
When to use: 15 / 20
Arguments: 9 / 25
Return value: 7 / 15
Constraints and side effects: 10 / 10
Examples: 5 / 10

Major
Arguments without a description: visualDirection.communicationJob, visualDirection.emotionalTarget, visualDirection.attentionPath, visualDirection.attentionPath.first, visualDirection.attentionPath.next, visualDirection.attentionPath.proof, visualDirection.visualLanguage, visualDirection.visualLanguage.space, visualDirection.visualLanguage.line, visualDirection.visualLanguage.shape, visualDirection.visualLanguage.tone, visualDirection.visualLanguage.color, visualDirection.visualLanguage.movement, visualDirection.visualLanguage.rhythm, visualDirection.camera, visualDirection.camera.shotSize, visualDirection.camera.angle, visualDirection.camera.movement, visualDirection.camera.lens, steps[].label, steps[].latex, steps[].explanation, scenes[].type, scenes[].durationInFrames, scenes[].narrationText, scenes[].visualResolution, scenes[].visualResolution.intent, scenes[].visualResolution.media, scenes[].visualResolution.source, scenes[].title, scenes[].subtitle, scenes[].text, scenes[].points, scenes[].latex, scenes[].value, scenes[].max, scenes[].label, scenes[].unit, scenes[].prefix, scenes[].suffix, scenes[].decimals, scenes[].color, scenes[].tone, scenes[].iconKey, scenes[].stepNumber, scenes[].totalSteps, scenes[].items, scenes[].items[].label, scenes[].items[].value, scenes[].src, scenes[].caption, scenes[].source, scenes[].generatePrompt, scenes[].generationContract, scenes[].generationContract.globalInvariants, scenes[].generationContract.shotDelta, scenes[].generationContract.referenceBindings, scenes[].generationContract.referenceBindings[].assetId, scenes[].generationContract.referenceBindings[].roles, scenes[].generationContract.prohibitedChanges, scenes[].generationContract.reviewCriteria, scenes[].trimStartSeconds, scenes[].trimEndSeconds, scenes[].playbackRate, scenes[].objectFit, scenes[].objectPosition, scenes[].scaleFrom, scenes[].scaleTo, scenes[].panFromX, scenes[].panToX, scenes[].panFromY, scenes[].panToY, scenes[].routeFrom, scenes[].routeTo, scenes[].routeLabel, scenes[].overlayKind, scenes[].overlayPosition, scenes[].accentColor, scenes[].overlayBackgroundColor, scenes[].cutFlash, scenes[].muted, scenes[].protectedRegionEffects, scenes[].protectedRegionEffects[].id, scenes[].protectedRegionEffects[].kind, scenes[].protectedRegionEffects[].coordinateSpace, scenes[].protectedRegionEffects[].region, scenes[].protectedRegionEffects[].region.leftPercent, scenes[].protectedRegionEffects[].region.topPercent, scenes[].protectedRegionEffects[].region.widthPercent, scenes[].protectedRegionEffects[].region.heightPercent, scenes[].protectedRegionEffects[].startFrame, scenes[].protectedRegionEffects[].endFrame, scenes[].protectedRegionEffects[].speedUpFrame, scenes[].protectedRegionEffects[].color, scenes[].protectedRegionEffects[].thicknessPercent, scenes[].flashAtFrame, scenes[].flashDurationFrames, assetSlots[].id, assetSlots[].sceneId, assetSlots[].region, assetSlots[].role, assetSlots[].kind, assetSlots[].source, assetSlots[].intent, assetSlots[].style, assetSlots[].style.opacity, assetSlots[].style.fit, assetSlots[].style.z, assetSlots[].timing, assetSlots[].timing.fromPct, assetSlots[].timing.toPct, assetSlots[].url, audioLayers[].id, audioLayers[].src, audioLayers[].startFrame, audioLayers[].durationInFrames, audioLayers[].volume, audioLayers[].fadeFrames, audioLayers[].role, directions.subtitle, directions.unitLabel, directions.distanceTimeChip, directions.clips, directions.clips[].src, directions.clips[].trimStartSeconds, directions.clips[].trimEndSeconds, directions.clips[].speed, directions.clips[].mirrorFlip, directions.cues, directions.cues[].atSeconds, directions.cues[].text, directions.cues[].arrow, directions.cues[].step, directions.outro, directions.outro.heading, directions.outro.body, directions.outro.seconds, directions.music, directions.music.perSegment, directions.music.perSegment[].src, directions.music.perSegment[].clipIndexStart, directions.music.perSegment[].hotOffsetSeconds, directions.music.perSegment[].volume, directions.music.crossfadeSeconds.param_no_description
Minor
String arguments with no constraint or example: steps[].label, steps[].latex, steps[].explanation, scenes[].narrationText, scenes[].title, scenes[].subtitle, scenes[].text, scenes[].latex, scenes[].label, scenes[].unit, scenes[].prefix, scenes[].suffix, scenes[].color, scenes[].tone, scenes[].iconKey, scenes[].items[].label, scenes[].src, scenes[].caption, scenes[].generatePrompt, scenes[].objectPosition, scenes[].routeFrom, scenes[].routeTo, scenes[].routeLabel, scenes[].accentColor, scenes[].overlayBackgroundColor, scenes[].protectedRegionEffects[].kind, assetSlots[].intent, directions.subtitle, directions.unitLabel, directions.distanceTimeChip, directions.clips[].src, directions.cues[].text, directions.outro.heading, directions.music.perSegment[].src.loose_string_param
Minor
The meaning of the boolean argument scenes[].cutFlash is unclear.vague_boolean
Minor
The meaning of the boolean argument scenes[].muted is unclear.vague_boolean
Minor
The meaning of the boolean argument directions.clips[].mirrorFlip is unclear.vague_boolean
Minor
Required identifiers whose description does not say where the value comes from: requestId. Name the tool or the place that returns it, or models look it up first.id_source_missing

get_video_render_status

69 / 100Cloudy

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

No issues.

list_video_projects

74 / 100Clear

Purpose: 20 / 20
When to use: 15 / 20
Arguments: 22 / 25
Return value: 7 / 15
Constraints and side effects: 10 / 10
Examples: 0 / 10

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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