Roblox MCP

Overview Schema Related Servers Score Discussions

Server Quality Checklist

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Latest release: v2.7.5
Disambiguation5/5
Each tool targets a distinct area (e.g., animation, assets, camera, effects, scripts, UI) with detailed descriptions that clearly separate their purposes. There is minimal overlap, and the few that might be confused (e.g., query_instances vs. workspace_state) have distinct operations.
Naming Consistency4/5
The majority of tools follow a 'verb_noun' pattern (e.g., manage_animation, query_instances), but a few outliers like batch_execute (noun_verb), spatial_query (adjective_noun), and system_info (noun_noun) break consistency, slightly reducing predictability.
Tool Count4/5
With 23 tools, the server covers a broad domain (Roblox Studio operations) without being overwhelming. While slightly above the typical 3-15 range, each tool addresses a specific function, making the count reasonable for the complexity of the platform.
Completeness5/5
The tool set provides comprehensive coverage for common development tasks: asset management, scripting, UI design, terrain editing, lighting, physics, and debugging. Advanced features like batch execution and Luau scripting fill gaps, making it suitable for both simple and complex workflows.
Average 3.4/5 across 23 of 23 tools scored. Lowest: 2.5/5.
See the Tool Scores section below for per-tool breakdowns.
- 42 of 42 community issues answered or closed in the last 6 months
- 48 commits in the last 12 weeks
- Last stable release on August 22, 2026
- No critical vulnerability alerts
- No high-severity vulnerability alerts
- No code scanning findings
- CI is passing
This repository is licensed under AGPL 3.0.
This repository includes a README.md file.
No tool usage detected in the last 30 days. Usage tracking helps demonstrate server value.
Tip: use the "Try in Browser" feature on the server page to seed initial usage.
This repository includes a glama.json configuration file.
If you are the author, simply .
If the server belongs to an organization, first add glama.json to the root of your repository:
```
{
  "$schema": "https://glama.ai/mcp/schemas/server.json",
  "maintainers": [
    "your-github-username"
  ]
}
```
Then . Browse examples.
Add related servers to improve discoverability.

How to sync the server with GitHub?

Servers are automatically synced at least once per day, but you can also sync manually at any time to instantly update the server profile.

To manually sync the server, click the "Sync Server" button in the MCP server admin interface.

How is the quality score calculated?

The overall quality score combines two components: Tool Definition Quality (70%) and Server Coherence (30%).

Tool Definition Quality measures how well each tool describes itself to AI agents. Every tool is scored 1–5 across six dimensions: Purpose Clarity (25%), Usage Guidelines (20%), Behavioral Transparency (20%), Parameter Semantics (15%), Conciseness & Structure (10%), and Contextual Completeness (10%). The server-level definition quality score is calculated as 60% mean TDQS + 40% minimum TDQS, so a single poorly described tool pulls the score down.

Server Coherence evaluates how well the tools work together as a set, scoring four dimensions equally: Disambiguation (can agents tell tools apart?), Naming Consistency, Tool Count Appropriateness, and Completeness (are there gaps in the tool surface?).

Tiers are derived from the overall score: A (≥3.5), B (≥3.0), C (≥2.0), D (≥1.0), F (<1.0). B and above is considered passing.

Tool Scores

Behavior2/5
Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
No annotations are provided, so the description carries full burden for behavioral disclosure. It does not mention side effects, read-only status, performance costs, or error handling. For a tool with 13 actions, this is insufficient.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.
Conciseness3/5
Is the description appropriately sized, front-loaded, and free of redundancy?
The description is a single line listing actions—concise but unstructured. It lacks hierarchy or context that would help an agent quickly grasp the tool's capabilities.
Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.
Completeness2/5
Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?
Given the complexity (37 parameters, 13 actions), the description is minimal. There is no explanation of return values, error handling, or how actions relate to each other. The schema covers parameter details but the description fails to tie everything together.
Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.
Parameters3/5
Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?
Schema coverage is 100% and each parameter has schema descriptions specifying which action it belongs to, defaults, and aliases. The tool description adds no further parameter information, so baseline 3 is appropriate.
Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.
Purpose3/5
Does the description clearly state what the tool does and how it differs from similar tools?
The description lists 13 spatial actions (e.g., raycast, find_ground) but lacks a single clear verb+resource statement. It reads as a menu rather than a coherent purpose, making it adequate but not distinctive from sibling tools.
Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.
Usage Guidelines2/5
Does the description explain when to use this tool, when not to, or what alternatives exist?
No guidance on when to use this tool versus alternatives. Sibling tools like query_instances or manage_physics could overlap, but no distinctions are provided. The agent must infer usage from the action names alone.
Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.
Behavior2/5
Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations, the description must disclose behavioral traits. It does not mention that actions like 'clear_history' and 'clear_cache' are destructive, nor any permissions or side effects. The read/write nature of each action is implied only through action names.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.
Conciseness4/5
Is the description appropriately sized, front-loaded, and free of redundancy?
The description is very short (one line) and concise, though it is a simple list without structural hierarchy (e.g., bullet points). It conveys the available actions efficiently for a compact tool.
Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.
Completeness3/5
Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?
Given the tool's complexity (9 distinct actions), the description only provides action names without explaining their behavior. The schema fills the gap, but the description alone is insufficient for an agent to understand the tool's full capabilities.
Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.
Parameters3/5
Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?
The input schema has 100% description coverage, so the baseline is 3. The tool description adds minimal value beyond listing action names; detailed parameter semantics are deferred entirely to the schema.
Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.
Purpose3/5
Does the description clearly state what the tool does and how it differs from similar tools?
The description lists sub-actions like 'full sync, snapshot, recent changes' but lacks a clear, single-sentence statement of the tool's overall purpose. It reads as a list rather than a coherent description, leaving ambiguity about the tool's primary function.
Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.
Usage Guidelines2/5
Does the description explain when to use this tool, when not to, or what alternatives exist?
The description provides no guidance on when to use this tool versus its siblings (e.g., manage_sync, query_instances). It does not mention prerequisites, context, or alternative approaches for achieving similar results.
Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.
Behavior2/5
Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
No annotations are provided, and the description does not disclose behavioral traits such as side effects, authentication requirements, rate limits, or what happens during read/write operations. It only outlines basic functionality without deeper context.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.
Conciseness3/5
Is the description appropriately sized, front-loaded, and free of redundancy?
The description is very concise, consisting of a single sentence. However, it lacks structure: it is not front-loaded, and the colon-separated list could be clearer. It is minimally acceptable but not well organized for quick scanning.
Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.
Completeness2/5
Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?
Despite high schema coverage, the tool is complex with multiple actions, a nested query object, and no output schema. The description does not explain return values, action-specific details, or required parameters (e.g., placeId for certain actions). It is incomplete for a tool of this complexity.
Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.
Parameters3/5
Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?
Schema description coverage is 100%, so the input schema already documents all parameters. The description summarizes the actions but adds little new meaning beyond the schema. Baseline of 3 is appropriate as the description does not significantly enhance parameter understanding.
Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.
Purpose4/5
Does the description clearly state what the tool does and how it differs from similar tools?
The description clearly specifies that the tool manages project sync, listing key actions (status, history, direction settings, read/write synced files). It distinguishes from sibling tools (e.g., manage_animation) by focusing on sync functionality. However, it does not explicitly differentiate from siblings.
Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.
Usage Guidelines2/5
Does the description explain when to use this tool, when not to, or what alternatives exist?
The description provides no guidance on when to use this tool versus alternatives. It does not mention prerequisites, context, or when not to use it. Sibling tools exist for different domains, but no explicit usage guidance is given.
Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.
Behavior2/5
Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
No annotations provided. The description does not disclose effects, side effects, or safety profile. For a configuration tool, information about mutation or persistence is missing.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.
Conciseness4/5
Is the description appropriately sized, front-loaded, and free of redundancy?
One sentence, front-loaded with '[PRO]'. Concise but could integrate sibling differentiation. No wasted words.
Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.
Completeness2/5
Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?
With 8 parameters, nested objects, no output schema, and no annotations, the description lacks behavioral context, return values, and usage patterns. Schema partially compensates but is insufficient.
Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.
Parameters3/5
Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?
Schema coverage is 100% with detailed parameter descriptions. The tool description adds minimal value (e.g., '[PRO]' prefix). Baseline of 3 is appropriate.
Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.
Purpose4/5
Does the description clearly state what the tool does and how it differs from similar tools?
The description clearly states the tool configures environment elements (lighting, atmosphere, sky, terrain, time). The action enum further specifies sub-actions. However, it does not distinguish from sibling tools like manage_terrain or manage_properties.
Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.
Usage Guidelines2/5
Does the description explain when to use this tool, when not to, or what alternatives exist?
No guidance on when to use this tool vs alternatives (e.g., manage_terrain for terrain, manage_properties for generic property changes). No prerequisites or exclusions mentioned.
Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.
Behavior2/5
Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
No annotations are provided, so the description must carry the full burden of behavioral disclosure. It does not mention that some actions are destructive (e.g., clear_region, write_voxels) or that others are read-only (e.g., read_voxel, colors_get). It also does not disclose any permissions, side effects, or constraints. The description only lists operations without behavioral context.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.
Conciseness4/5
Is the description appropriately sized, front-loaded, and free of redundancy?
The description is a single sentence with a clear, list-like structure, front-loading the purpose. It is concise and covers the major capabilities. However, it could be more structured (e.g., separating read and write operations) to improve scannability.
Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.
Completeness3/5
Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?
Given the high complexity (26 parameters, multiple actions) and no output schema, the description provides a high-level overview but lacks details like which parameters are required for which actions. However, the input schema is very detailed with per-parameter descriptions and usage per action, which compensates. The description alone is not fully complete, but combined with the schema it is adequate.
Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.
Parameters3/5
Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?
Schema description coverage is 100%, so the baseline is 3. The description does not add additional meaning beyond what is already in each parameter's description. It merely categorizes operations but does not provide examples or contextual details that enhance understanding.
Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.
Purpose4/5
Does the description clearly state what the tool does and how it differs from similar tools?
The description clearly states that this tool handles terrain operations, listing specific categories like fill shapes, clear regions, replace materials, manage colors, read/write voxels, generate procedural terrain, and smooth terrain. It distinguishes itself from sibling tools which cover other domains (animation, assets, audio, etc.). However, the description does not single out a specific verb-resource pair, instead listing many capabilities, which slightly reduces clarity.
Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.
Usage Guidelines2/5
Does the description explain when to use this tool, when not to, or what alternatives exist?
The description does not provide any guidance on when to use this tool versus alternatives or when not to use it. It only lists what the tool does, without explicit context or exclusions. While sibling tools are clearly different domains, the absence of usage instructions is a gap.
Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.
Behavior2/5
Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
No annotations are provided, so the description carries full burden. It does not disclose behavioral traits such as side effects (e.g., mutating state), permission requirements, or idempotence. Actions like insert and export have different impacts but are not described.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.
Conciseness4/5
Is the description appropriately sized, front-loaded, and free of redundancy?
The description is a single sentence that efficiently lists the available actions. It is concise and front-loaded with purpose, though it could benefit from structuring actions into groups for clarity.
Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.
Completeness2/5
Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?
Given the tool's complexity (16 parameters, multiple actions with different requirements), the description is insufficient. It does not explain the overall workflow, when to use each action, or how actions relate to each other. The schema covers parameter details but lacks a high-level narrative.
Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.
Parameters3/5
Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?
Schema description coverage is 100%, and the schema provides detailed parameter descriptions. The tool description adds no additional meaning beyond what the schema already offers, so baseline 3 is appropriate.
Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.
Purpose5/5
Does the description clearly state what the tool does and how it differs from similar tools?
The description lists specific actions (insert, info, search, search_insert, insert_free, insert_package, export) that clearly define what the tool does with assets. It distinguishes from sibling tools by specifying asset management.
Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.
Usage Guidelines2/5
Does the description explain when to use this tool, when not to, or what alternatives exist?
No explicit guidance on when to use this tool vs. alternatives or when not to use it. The description implies asset-related operations but provides no exclusion criteria or context for choosing this tool over siblings like manage_audio or manage_animation.
Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.
Behavior2/5
Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
No annotations are provided, and the description does not disclose behavioral traits such as whether actions are destructive, require permissions, or have side effects. The agent gets no insight into the tool's impact.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.
Conciseness4/5
Is the description appropriately sized, front-loaded, and free of redundancy?
The description is a single concise sentence that front-loads the purpose. However, given the tool's complexity (multiple actions and many parameters), it could be slightly more structured without adding length.
Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.
Completeness2/5
Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?
The description is insufficient for a tool with three distinct actions and many optional parameters. It does not explain the context and replay parameters, nor does it describe return values (no output schema). Missing guidance on action usage.
Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.
Parameters3/5
Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?
Schema description coverage is 100%, so the schema already documents parameters. The description adds minimal value beyond listing the actions, which the schema also describes. No additional semantic context is given.
Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.
Purpose5/5
Does the description clearly state what the tool does and how it differs from similar tools?
The description clearly states it manages physics collision groups with three specific actions: register, set collidable, and list groups. This distinguishes it from sibling tools like manage_animation or manage_audio, which handle different domains.
Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.
Usage Guidelines2/5
Does the description explain when to use this tool, when not to, or what alternatives exist?
No guidance on when to use this tool versus alternatives, no prerequisites or exclusions. The description does not help an agent decide when to invoke this tool.
Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.
Behavior2/5
Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Without annotations, the description carries full burden for behavioral disclosure. It lists actions but does not mention side effects, destructive potential, or whether changes are reversible. The agent cannot infer safety or mutation scope from the description alone.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.
Conciseness5/5
Is the description appropriately sized, front-loaded, and free of redundancy?
The description is a single, well-structured sentence that lists key actions and highlights the PRO feature. Every word adds value, and no extraneous information is present. This is exemplary conciseness.
Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.
Completeness3/5
Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?
Given the complexity (22 parameters) and lack of output schema, the description is minimal but adequate when combined with the exhaustive schema. It does not explain the dispatcher nature of the action parameter or the structure of results, leaving gaps for an agent to discover via schema.
Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.
Parameters3/5
Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?
With 100% schema description coverage, the description adds no extra meaning to parameters. Baseline 3 is appropriate since the schema already documents the purpose of each parameter and ties them to actions.
Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.
Purpose4/5
Does the description clearly state what the tool does and how it differs from similar tools?
The description clearly states the tool manages script source code and lists specific actions (read, write, create, delete, etc.), distinguishing it from sibling tools like execute_luau. However, it does not explicitly cover all actions (e.g., get_dependencies) without referencing the schema.
Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.
Usage Guidelines2/5
Does the description explain when to use this tool, when not to, or what alternatives exist?
No guidance on when to use this tool versus alternatives (e.g., execute_luau for running scripts). The only usage hint is the PRO feature marker, but no context or exclusion criteria are provided.
Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.
Behavior2/5
Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations, the description should disclose behavioral traits like destructiveness, permission requirements, or side effects. It only says 'smooth animations' and lists actions, missing critical context for an AI agent.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.
Conciseness4/5
Is the description appropriately sized, front-loaded, and free of redundancy?
The description is a single, front-loaded sentence. It is concise but could be more informative without becoming verbose.
Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.
Completeness2/5
Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?
Given 8 parameters, nested objects, and no output schema, the description fails to explain return values (e.g., tweenId from create) or provide sufficient behavioral context for a complex tool.
Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.
Parameters3/5
Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?
Schema coverage is 100%, so parameters are fully documented there. The description adds little beyond summarizing actions, meeting the baseline.
Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.
Purpose5/5
Does the description clearly state what the tool does and how it differs from similar tools?
The description clearly states the verb 'manage tween service' and enumerates the specific actions (create, play, pause, cancel). It distinguishes this tool from siblings like manage_animation by focusing on tweens.
Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.
Usage Guidelines2/5
Does the description explain when to use this tool, when not to, or what alternatives exist?
No guidance on when to use this tool versus alternatives such as manage_animation or manage_effects. No mention of prerequisites, typical use cases, or when not to use it.
Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.
Behavior2/5
Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations, the description must disclose behavioral traits. It only lists actions without mentioning side effects, permissions, error conditions, or whether operations are destructive. For a tool that loads and plays animations, this is a significant gap.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.
Conciseness4/5
Is the description appropriately sized, front-loaded, and free of redundancy?
The description is a single sentence that efficiently lists key actions. It is front-loaded with '[PRO]' and the word 'Animation'. While slightly minimal, it contains no unnecessary words and is easy to parse.
Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.
Completeness2/5
Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?
Given 11 parameters, nested objects, and no output schema, the description is too brief. It omits return values, error handling, prerequisites (e.g., a valid Humanoid), and behavioral context. Users cannot assess completeness without inspecting schema further.
Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.
Parameters3/5
Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?
Schema description coverage is 100%, with detailed descriptions for each parameter. The tool description adds no extra meaning beyond the schema. According to guidelines, baseline 3 is appropriate when schema does the heavy lifting.
Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.
Purpose5/5
Does the description clearly state what the tool does and how it differs from similar tools?
The description clearly states the tool's purpose: load, play, stop animations, and get animation tracks. It explicitly lists the main actions and the target (humanoid/controller), effectively distinguishing it from sibling tools like manage_audio or manage_camera.
Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.
Usage Guidelines3/5
Does the description explain when to use this tool, when not to, or what alternatives exist?
No explicit when-to-use or when-not-to-use guidance is provided. However, sibling tools cover distinct domains, so the usage context is implied. The description lacks guidance on choosing between actions, but the input schema's detailed action descriptions compensate partially.
Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.
Behavior2/5
Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
No annotations are provided, so the description carries full burden. It only lists actions without explaining side effects, persistence, permissions, or limitations beyond basic functionality.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.
Conciseness4/5
Is the description appropriately sized, front-loaded, and free of redundancy?
The description is a single, efficient sentence. It is front-loaded with '[PRO]' but remains concise. Could be slightly more structured but overall clear.
Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.
Completeness2/5
Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?
Despite 7 parameters and nested objects, the description is minimal. It does not explain return values, relationships between parameters, or behavior in edge cases. The schema helps but the description lacks depth.
Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.
Parameters3/5
Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?
Schema coverage is 100%, so each parameter has a description. The description adds a brief grouping of actions but does not provide additional meaning beyond what the schema already offers.
Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.
Purpose5/5
Does the description clearly state what the tool does and how it differs from similar tools?
The description clearly states the tool manages particle effects with three actions: emit, clear, toggle. It distinguishes from sibling tools like manage_audio or manage_lighting, which cover other domains.
Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.
Usage Guidelines3/5
Does the description explain when to use this tool, when not to, or what alternatives exist?
Usage is implied by the domain (particle effects) but no explicit guidance on when to use this tool versus alternatives or when not to use it. No exclusion criteria mentioned.
Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.
Behavior2/5
Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
No annotations are provided, so the description must carry full behavioral transparency. It only lists actions without disclosing side effects, permissions, rate limits, or failure behavior. The agent lacks key context for robust usage.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.
Conciseness4/5
Is the description appropriately sized, front-loaded, and free of redundancy?
The description is very concise, front-loading the core purpose. However, given the tool's complexity (8 parameters, multiple actions), it could be slightly expanded without losing efficiency.
Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.
Completeness2/5
Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?
No output schema exists, and the description does not mention return values or behavior for actions like 'get', 'cached', or 'watch'. This leaves a significant gap for the agent to understand what the tool returns.
Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.
Parameters3/5
Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?
The input schema covers all parameters with detailed descriptions (100% coverage), so the description does not add significant meaning beyond the schema. Baseline of 3 is appropriate.
Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.
Purpose5/5
Does the description clearly state what the tool does and how it differs from similar tools?
The description clearly states that the tool manages selection: 'Get, set, or clear selection.' and lists both basic and PRO actions, distinguishing it from sibling tools like manage_properties or manage_studio.
Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.
Usage Guidelines3/5
Does the description explain when to use this tool, when not to, or what alternatives exist?
The description implies usage (e.g., basic vs PRO actions) but does not explicitly state when to use this tool over alternatives or provide exclusions. No direct guidance on when-not to use.
Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.
Behavior2/5
Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
No annotations are provided, so the description carries the full burden. It does not disclose behavioral traits such as whether the tool is read-only (though implied), rate limits, authentication needs, or side effects. It only mentions PRO features.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.
Conciseness4/5
Is the description appropriately sized, front-loaded, and free of redundancy?
The description is two sentences, concise and to the point. It could be better structured (e.g., grouping basic vs PRO actions), but it is not verbose or redundant.
Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.
Completeness2/5
Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?
Given the tool has no output schema and 20 parameters, the description does not explain what the tool returns (e.g., instance paths, tables, etc.). This is a significant gap for an agent to understand the tool's full behavior.
Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.
Parameters3/5
Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?
Schema description coverage is 100%, so baseline is 3. The description adds a summary of actions but does not provide additional meaning beyond what each parameter's 'Used by:' note already conveys. It adds marginal value.
Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.
Purpose5/5
Does the description clearly state what the tool does and how it differs from similar tools?
The description starts with 'Query Roblox instances' and lists specific actions like get, children, find child/descendant, etc., clearly indicating the verb and resource. It distinguishes from sibling tools like mutate_instances by being a read-only query tool.
Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.
Usage Guidelines3/5
Does the description explain when to use this tool, when not to, or what alternatives exist?
The description does not provide explicit guidance on when to use this tool versus alternatives like mutate_instances or other sibling tools. While the action list implies different use cases, there is no direct comparison or exclusion criteria.
Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.
Behavior2/5
Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations, the description carries the full burden of transparency. It mentions destructive actions (delete) but does not disclose side effects, authorization needs, rate limits, or that some actions are irreversible.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.
Conciseness4/5
Is the description appropriately sized, front-loaded, and free of redundancy?
The description is concise (two lines, front-loaded with actions). However, it could be slightly more structured to group actions clearly.
Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.
Completeness3/5
Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?
Given the high parameter count (22) and multiple actions, the description does not adequately explain the overall tool behavior or how to select among actions. The schema covers details, but the description lacks high-level context.
Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.
Parameters3/5
Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?
Schema coverage is 100%, so the parameter descriptions in the schema are thorough. The tool description adds no additional meaning beyond listing actions; it does not explain how parameters relate to actions.
Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.
Purpose5/5
Does the description clearly state what the tool does and how it differs from similar tools?
The description clearly states the tool performs multiple mutation actions (create, delete, clone, move, rename, pivot) on instances. It lists specific actions and distinguishes PRO features, making the purpose immediately obvious.
Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.
Usage Guidelines3/5
Does the description explain when to use this tool, when not to, or what alternatives exist?
The description implies this tool is for mutating instances but provides no explicit guidance on when to use it versus alternatives like query_instances. It does not mention exclusions or prerequisites.
Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.
Behavior2/5
Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
No annotations are provided, so the description must carry the full burden of behavioral disclosure. It only lists actions without mentioning side effects (e.g., creation of Sound instances), permissions required, or return values. The schema does provide some detail in action descriptions, but the description itself lacks transparency.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.
Conciseness5/5
Is the description appropriately sized, front-loaded, and free of redundancy?
The description is a single sentence that immediately communicates the tool's purpose and main actions. It is concise and front-loaded, with no unnecessary words.
Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.
Completeness3/5
Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?
Given the complexity (11 parameters, no output schema, no annotations), the description is minimal but the rich schema compensates by detailing parameter usage. However, it does not explain return values, preconditions, or overall behavior in a narrative, making it just adequate.
Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.
Parameters3/5
Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?
Schema coverage is 100% with detailed descriptions for each parameter, including which actions they apply to. The description does not add additional meaning beyond what the schema provides, so a baseline score of 3 is appropriate.
Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.
Purpose5/5
Does the description clearly state what the tool does and how it differs from similar tools?
The tool name 'manage_audio' clearly indicates the domain, and the description lists the specific actions: play, stop, pause, resume, set_listener. This provides a specific verb-resource relationship and distinguishes it from sibling tools like manage_animation or manage_camera.
Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.
Usage Guidelines3/5
Does the description explain when to use this tool, when not to, or what alternatives exist?
No explicit guidance is provided on when to use this tool vs alternatives, beyond the implicit domain of audio control. The description does not mention common pitfalls or prerequisites, so usage is implied rather than explicit.
Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.
Behavior2/5
Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
No annotations are provided, so the description must fully disclose behavioral traits. It only mentions get/set and lists action names, but does not warn about destructive operations like delete_attr, remove_tag, or mass modifications. The description fails to convey side effects or permissions needed.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.
Conciseness5/5
Is the description appropriately sized, front-loaded, and free of redundancy?
The description is extremely concise: one sentence plus a list of PRO actions. It is front-loaded with the main purpose, and every word earns its place. No redundancy or verbosity.
Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.
Completeness2/5
Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?
Given the tool's complexity (25 parameters, many actions, no output schema), the description is minimal. It does not explain return values, error handling, usage of contextId, or how to choose between actions. The description is insufficient for an agent to fully understand the tool's behavior.
Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.
Parameters3/5
Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?
Schema coverage is 100% with detailed descriptions per parameter, so the description adds little extra value beyond listing PRO actions. Baseline score of 3 is appropriate as the description does not significantly enhance understanding of parameter usage.
Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.
Purpose5/5
Does the description clearly state what the tool does and how it differs from similar tools?
The description clearly states it manages properties, attributes, and tags on instances, specifying actions like get/set and listing PRO features. This distinguishes it from sibling tools focused on other domains (e.g., animation, audio).
Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.
Usage Guidelines4/5
Does the description explain when to use this tool, when not to, or what alternatives exist?
The description divides actions into basic and PRO, implying usage tiers, but does not explicitly state when to use this tool versus alternatives like mutate_instances. The context is clear for an experienced agent, but lacks explicit exclusions.
Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.
Behavior3/5
Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations, the description carries full burden. It discloses sequential execution and optional stop-on-error, but lacks details on side effects, error handling, atomicity, or response format.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.
Conciseness5/5
Is the description appropriately sized, front-loaded, and free of redundancy?
Two concise sentences with no fluff, front-loading the purpose and structure.
Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.
Completeness3/5
Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?
Adequately describes the core functionality but misses details like maximum batch size, response format, and whether execution is transactional. For a batch tool, more completeness about limits and rollback behavior would improve usability.
Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.
Parameters3/5
Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?
Schema coverage is 100%, so baseline 3. The description adds context about execution order and error behavior, but the schema already documents parameters sufficiently.
Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.
Purpose5/5
Does the description clearly state what the tool does and how it differs from similar tools?
The description clearly states the verb 'Execute' and the resource 'multiple commands in a single batch', and distinguishes from siblings like execute_luau which executes a single script.
Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.
Usage Guidelines3/5
Does the description explain when to use this tool, when not to, or what alternatives exist?
The description implies usage for batch execution but does not explicitly state when to use this tool versus alternatives, nor does it provide exclusions or prerequisites. The [PRO] label is undefined.
Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.
Behavior3/5
Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
No annotations are provided, so the description must cover behavioral aspects. It discloses behaviors like asset recommendation acceptance and refers to a full guide, but lacks details on reversibility, permissions, or side effects of actions beyond design_brief.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.
Conciseness4/5
Is the description appropriately sized, front-loaded, and free of redundancy?
The description is front-loaded with a clear purpose and packs multiple guidelines. While lengthy, every sentence adds value, avoiding redundancy. It could be slightly more concise without losing information.
Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.
Completeness3/5
Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?
For a tool with 11 parameters and nested objects, the description explains the design_brief workflow in detail but leaves gaps for other actions (e.g., check output). No output schema, so more detail on results would improve completeness.
Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.
Parameters3/5
Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?
Input schema has 100% description coverage, providing baseline 3. The description adds workflow context (e.g., 'Always start with design_brief') but does not significantly enhance parameter meaning beyond the schema's own descriptions.
Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.
Purpose5/5
Does the description clearly state what the tool does and how it differs from similar tools?
The description clearly states 'Create / update / verify Roblox in-game UI (ScreenGui / Frame / TextLabel / …).' It specifies the verb and resource, and distinguishes itself from sibling tools like manage_assets or manage_scripts by focusing on UI elements.
Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.
Usage Guidelines4/5
Does the description explain when to use this tool, when not to, or what alternatives exist?
The description explicitly advises to 'Always start a new UI task with the `design_brief` action' and provides guidance on handling enums and references. It offers clear context but does not explicitly state when to avoid this tool in favor of siblings, though the sibling tools are distinct enough.
Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.
Behavior4/5
Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations, the description carries the full burden. It discloses the sandbox environment, lists blocked services, and notes restrictions on CoreGui/CorePackages. However, it doesn't explicitly describe potential mutability or destructiveness, which is inherent but should be stated for full transparency.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.
Conciseness5/5
Is the description appropriately sized, front-loaded, and free of redundancy?
The description is a single sentence, front-loaded with the purpose. Every phrase (PRO tag, execution capability, sandbox, restrictions) is necessary and concise.
Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.
Completeness4/5
Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?
Given the tool's complexity (arbitrary code execution) and the lack of an output schema, the description is fairly complete. It covers the sandbox, blocked services, and return serialization. However, it could mention that this is for one-off execution or that it assumes developer privileges.
Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.
Parameters3/5
Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?
Schema description coverage is 100%, so the baseline is 3. The description adds value by mentioning the sandbox and serialized returns, but it does not provide additional parameter-specific meaning beyond what is in the schema.
Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.
Purpose5/5
Does the description clearly state what the tool does and how it differs from similar tools?
The description clearly states 'Execute arbitrary Luau code in Roblox Studio sandbox,' which is a specific verb-resource combination. The mention of blocked services and restricted access distinguishes it from sibling tools like batch_execute and specialized utilities.
Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.
Usage Guidelines3/5
Does the description explain when to use this tool, when not to, or what alternatives exist?
The description provides implicit guidance through its list of blocked services and restrictions, but does not explicitly state when to use this tool versus alternatives like batch_execute. No comparison or exclusion criteria are given.
Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.
Behavior4/5
Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations, the description carries the full transparency burden. It discloses key behaviors: clear does not reset sequence numbers, cursor mode returns logs oldest-to-newest with metadata. However, it omits whether clear is destructive or irreversible, and doesn't specify return values.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.
Conciseness4/5
Is the description appropriately sized, front-loaded, and free of redundancy?
The description is a single sentence that front-loads the core purpose ('Output logs') and enumerates capabilities compactly. While not bulleted, it is clear and avoids redundancy. Could be slightly improved with structured formatting.
Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.
Completeness3/5
Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?
Given no output schema and six parameters, the description explains actions and cursor behavior but lacks details on return values (e.g., what 'clear' returns, error handling). This leaves gaps for agents needing full response context.
Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.
Parameters4/5
Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?
Schema coverage is 100%, but the description adds value by grouping parameters per action (e.g., level, limit, pattern for 'get') and specifying default limits (100 for get, 20 for errors). This context helps agents set appropriate values beyond the schema.
Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.
Purpose5/5
Does the description clearly state what the tool does and how it differs from similar tools?
The description clearly states the tool is for outputting logs and lists three distinct actions (get, clear, errors) with specific capabilities like filtered retrieval and cursor-based polling. This distinguishes it from sibling tools like manage_animation or manage_assets, which handle different domains.
Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.
Usage Guidelines3/5
Does the description explain when to use this tool, when not to, or what alternatives exist?
The description implies when to use each action (e.g., 'get' for retrieval, 'clear' for buffer clearing), but provides no explicit guidance on when not to use this tool or alternatives. No mention of prerequisites or comparative usage with sibling tools.
Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.
Behavior3/5
Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations provided, the description carries full burden. It describes toggling UI preview and the scope, but does not mention side effects, permissions, or whether the change is persistent or session-only.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.
Conciseness5/5
Is the description appropriately sized, front-loaded, and free of redundancy?
Two well-structured sentences with no waste. Front-loaded with the core purpose and a crucial limitation.
Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.
Completeness4/5
Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?
Given the tool's simplicity and full schema coverage, the description adequately covers the tool's functionality and constraints. No output schema exists, but the return value is not critical for a control action; a minor improvement would be to mention the expected output.
Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.
Parameters3/5
Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?
Schema coverage is 100%, with clear parameter descriptions. The tool description adds no additional meaning beyond what the schema provides for parameters, so baseline 3 applies.
Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.
Purpose5/5
Does the description clearly state what the tool does and how it differs from similar tools?
The description clearly states it controls Studio editor view/rendering settings for screenshot and QA workflows, and explicitly distinguishes from editing game UI objects, which helps differentiate from the sibling manage_ui tool.
Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.
Usage Guidelines4/5
Does the description explain when to use this tool, when not to, or what alternatives exist?
It states when to use (for Studio session-level View settings like UI preview) and when not (does not edit game UI objects), but does not explicitly name alternative tools or provide exclusions.
Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.
Behavior4/5
Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations, the description carries the full burden. It details each action's behavior (e.g., ping returns pong, run_test injects scripts and writes reports). It is transparent about side effects and output, though it does not explicitly label actions as safe/destructive. The per-action descriptions provide sufficient behavioral clarity.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.
Conciseness3/5
Is the description appropriately sized, front-loaded, and free of redundancy?
The description is front-loaded with a summary line, but the long action enumeration within the description text is verbose and could be structured more concisely. Still, it is readable and informative.
Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.
Completeness5/5
Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?
Given the complexity (9 parameters, multiple actions, nested objects) and lack of output schema, the description is thoroughly complete. It covers each action's purpose, parameters, and behavior, leaving no obvious gaps.
Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.
Parameters4/5
Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?
Schema coverage is 100%, so baseline is 3. The description adds meaning by grouping related parameters and explaining which actions use each parameter (e.g., 'Used by: ping' for message). This context goes beyond the schema's individual descriptions.
Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.
Purpose5/5
Does the description clearly state what the tool does and how it differs from similar tools?
The description clearly states the tool's purpose: it provides system info and control actions (ping, connection, usage, plus PRO actions). The action enum and brief summaries differentiate it from sibling tools like execute_luau or manage_*.
Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.
Usage Guidelines3/5
Does the description explain when to use this tool, when not to, or what alternatives exist?
The description implies usage through the enumerated actions and notes which actions are PRO, but does not explicitly state when to use this tool over alternatives or provide exclusion criteria. The action list is the primary guidance.
Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.
Behavior4/5
Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations, the description carries full burden. It discloses critical constraints (Edit mode only, screenshot not usable during playtest), explains resolution limits and plugin settings, and notes default behaviors for parameters like distance and offset. It does not describe all possible errors but covers major behavioral traits.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.
Conciseness5/5
Is the description appropriately sized, front-loaded, and free of redundancy?
The description is a single paragraph that front-loads the main purpose and then adds necessary details. Every sentence adds value: listing actions, restricting scope, and clarifying screenshot behavior. No redundant or filler content.
Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.
Completeness4/5
Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?
For an 8-parameter tool with no output schema and no annotations, the description covers purpose, parameter usage, constraints, and behavioral notes adequately. It explains the screenshot restriction thoroughly and provides default behaviors. Minor gaps: no description of return values for info/suggest actions, but overall sufficient.
Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.
Parameters4/5
Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?
Input schema has 100% coverage with descriptions for each parameter. The description adds value beyond the schema by providing auto-calculation hints, default values (duration 0.5, offset {1,0.5,1}), and usage context (e.g., which action uses which parameter). This goes beyond baseline 3.
Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.
Purpose5/5
Does the description clearly state what the tool does and how it differs from similar tools?
The description explicitly states 'Camera operations' and lists five specific actions (info, focus_path, focus_position, suggest, screenshot) with clear verbs. It distinguishes itself from sibling tools by focusing solely on camera management, which is a distinct resource.
Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.
Usage Guidelines4/5
Does the description explain when to use this tool, when not to, or what alternatives exist?
The description clearly states when to use the tool (Edit mode only, not during playtest) and provides explicit guidance for the screenshot action, including a precondition check using system_info.play_status. It also mentions required settings for screenshot. However, it does not compare directly to siblings, though siblings cover different domains, so this is minor.
Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.

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