MCP Color Server

Server Quality Checklist

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Latest release: v1.0.0
Disambiguation3/5
The tools have clear individual purposes, but significant overlap exists in visualization and export functions. For example, create_palette_html and create_palette_png serve similar purposes with different output formats, as do the multiple gradient and export tools. Descriptions help differentiate, but agents might struggle choosing between format-specific variants.
Naming Consistency5/5
Tool names follow a highly consistent verb_noun pattern throughout, with clear action prefixes like analyze_, check_, convert_, create_, export_, generate_, mix_, optimize_, simulate_, and sort_. All names use snake_case consistently, making them predictable and readable.
Tool Count2/5
With 25 tools, this server feels overloaded for a color manipulation domain. Many tools could be consolidated (e.g., multiple create_* and export_* variants), leading to redundancy. A more focused set of 10-15 tools would better serve the core functionality without overwhelming agents.
Completeness5/5
The toolset provides comprehensive coverage for color manipulation, analysis, visualization, and integration. It includes core operations (convert, mix, generate variations), accessibility features, multiple output formats, and design system support. No obvious gaps exist; agents can perform complete color workflow tasks.
Average 3/5 across 25 of 25 tools scored.
See the Tool Scores section below for per-tool breakdowns.
- No community issues in the last 6 months
- 0 commits in the last 12 weeks
- No stable releases found
- No critical vulnerability alerts
- No high-severity vulnerability alerts
- No code scanning findings
- CI is passing
This repository is licensed under MIT License.
This repository includes a README.md file.
No tool usage detected in the last 30 days. Usage tracking helps demonstrate server value.
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{
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  "maintainers": [
    "your-github-username"
  ]
}
```
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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?
With no annotations provided, the description carries the full burden of behavioral disclosure. It mentions 'programmatic use and API integration' which hints at technical usage, but doesn't describe what the tool actually does behaviorally - that it takes color inputs and produces structured JSON output with various formatting options. It doesn't mention whether this is a read-only operation, what the output looks like, or any performance considerations.
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 that gets straight to the point. It's appropriately sized for what it communicates, though what it communicates is limited. There's no wasted verbiage or unnecessary elaboration.
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?
For a tool with 9 parameters, no annotations, and no output schema, the description is insufficient. It doesn't explain what the tool actually produces (JSON representation of color data), doesn't provide context about typical use cases, and doesn't help the agent understand when this would be the right choice among multiple export options. The description leaves too much unexplained given the tool's 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?
The schema description coverage is 100%, so the schema already documents all 9 parameters thoroughly with descriptions, defaults, and constraints. The description adds no additional parameter information beyond mentioning 'multiple structure options' which loosely references the 'format' parameter. This meets the baseline expectation when schema coverage is high.
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 states the tool 'Generate[s] JSON format for programmatic use and API integration' which indicates its purpose is to output JSON data. However, it's vague about what exactly is being exported - it mentions 'multiple structure options' but doesn't specify this is for color data, which is clear from the parameters but not from the description alone. It doesn't clearly distinguish from sibling export tools like export_css or export_scss.
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. There's no mention of when JSON export would be preferred over CSS, SCSS, or Tailwind exports (sibling tools), nor any context about prerequisites or typical use cases. The agent receives no help in selecting this tool over other export options.
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 provided, the description carries full burden for behavioral disclosure. While it mentions what properties are analyzed, it doesn't describe the tool's behavior: what format the analysis returns, whether it's a read-only operation, if there are rate limits, computational costs, or what happens when 'include_recommendations' is enabled. For a tool with 4 parameters and no annotation coverage, 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.
Conciseness5/5
Is the description appropriately sized, front-loaded, and free of redundancy?
The description is a single, efficient sentence that communicates the core functionality without wasted words. It's appropriately sized for the tool's complexity and front-loads the essential information about what properties are analyzed.
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?
For a tool with 4 parameters, no annotations, and no output schema, the description is inadequate. It doesn't explain what the analysis returns, how results are structured, what 'recommendations' entail, or provide behavioral context needed for proper tool selection. The description should compensate for the lack of structured metadata but doesn't.
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 all parameters thoroughly. The description mentions 'optionally compare with another color' which hints at the 'compare_color' parameter, but doesn't add meaningful semantic context beyond what's in the schema. The baseline of 3 is appropriate when the schema does the heavy lifting.
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's purpose: 'Analyze color properties including brightness, temperature, contrast, accessibility, and optionally compare with another color'. It specifies the verb ('analyze') and resources (color properties), but doesn't explicitly differentiate from sibling tools like 'check_contrast' or 'optimize_for_accessibility' which might have overlapping functionality.
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. With many sibling tools for color analysis and manipulation (e.g., 'check_contrast', 'optimize_for_accessibility', 'simulate_colorblindness'), there's no indication of when this comprehensive analysis tool is preferred over more specialized alternatives.
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 provided, the description carries full burden for behavioral disclosure. While it lists what metrics are calculated, it doesn't describe what the analysis returns, whether it's computationally intensive, what format the results come in, or any limitations beyond the 2-50 color range mentioned in the schema. This is inadequate for a tool with no annotation coverage.
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 that clearly states the tool's purpose. It's appropriately sized and front-loaded with the core functionality. However, it could potentially benefit from slightly more structure given the complexity of the analysis being performed.
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?
For a tool with no annotations and no output schema, the description is insufficiently complete. It doesn't explain what the analysis returns, the format of results, or how to interpret the metrics. Given the tool's complexity (analyzing multiple color metrics) and lack of structured output documentation, the description should provide more context about the tool's behavior and results.
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%, providing good documentation for both parameters. The description adds minimal value beyond the schema - it mentions the same metrics listed in the schema's enum but doesn't explain what these metrics mean or how they're calculated. Baseline 3 is appropriate when the schema does the heavy lifting.
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's purpose: analyzing a collection of colors for specific metrics (diversity, harmony, contrast range, temperature distribution, accessibility metrics). It uses a specific verb ('analyze') and resource ('collection of colors'), but doesn't explicitly differentiate from sibling tools like 'analyze_color' or 'check_contrast'.
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. With many sibling tools available (like analyze_color, check_contrast, optimize_for_accessibility), there's no indication of when this comprehensive analysis tool is preferred over more specialized alternatives.
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 of behavioral disclosure. While it mentions compliance checking, it doesn't describe what the tool returns (e.g., pass/fail results, contrast ratios, specific WCAG level details), whether it has side effects, or any rate limits or authentication needs. For a tool with no annotation coverage, this leaves significant gaps in understanding its behavior.
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, efficient sentence that directly states the tool's purpose without unnecessary words. It's front-loaded with the core functionality ('check color contrast compliance'), making it easy to parse. Every part of the sentence earns its place by specifying the domain (accessibility) and standard (WCAG).
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 of accessibility checking and the lack of annotations and output schema, the description is incomplete. It doesn't explain what the tool returns (e.g., a compliance status, contrast ratio, or detailed report), which is critical for an agent to use it effectively. Without this, the agent lacks context on how to interpret results or handle errors.
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, clearly documenting all four parameters with enums and defaults. The description adds no additional parameter semantics beyond what's in the schema—it doesn't explain color format expectations (e.g., hex codes, RGB), how 'text_size' affects compliance, or differences between standards like WCAG_AA vs. APCA. With high schema coverage, the baseline score 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's purpose: checking color contrast compliance with WCAG accessibility standards. It specifies the verb ('check') and resource ('color contrast compliance'), making it immediately understandable. However, it doesn't explicitly differentiate from sibling tools like 'optimize_for_accessibility' or 'simulate_colorblindness', which prevents a perfect score.
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 doesn't mention sibling tools like 'optimize_for_accessibility' (which might adjust colors for compliance) or 'analyze_color' (which might provide broader analysis), leaving the agent with no context for tool selection. The description only states what the tool does, not when it's appropriate.
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 of behavioral disclosure. It mentions generating PNG images but doesn't cover critical aspects like performance (e.g., processing time for large color sets), side effects (e.g., file creation), error handling, or output format details. For a tool with 7 parameters and no annotations, this leaves significant gaps in understanding its behavior.
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, efficient sentence that front-loads the core purpose without unnecessary words. It's appropriately sized for the tool's complexity, with every part contributing to understanding what the tool does. There's no wasted verbiage or structural issues.
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 (7 parameters, no output schema, no annotations), the description is incomplete. It doesn't address output details (e.g., PNG format specifics, error cases), usage constraints, or how it fits among sibling tools. For a tool that generates visual content with multiple options, more context is needed to ensure proper agent invocation.
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 description adds minimal semantic context beyond the input schema. It implies parameters for color sets and visualization styles, but the schema already has 100% description coverage with detailed parameter docs (e.g., 'Array of color arrays to compare'). Since the schema does the heavy lifting, the baseline is 3, as the description doesn't 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 states the tool's purpose: 'Generate PNG images comparing multiple color sets with various visualization styles.' It specifies the action (generate PNG images), the resource (color sets), and the scope (comparison with visualization styles). However, it doesn't explicitly differentiate from sibling tools like 'create_gradient_png' or 'create_palette_png' beyond the 'comparison' aspect, which is why it's not a 5.
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. With many sibling tools for color-related tasks (e.g., 'create_gradient_png', 'create_palette_png', 'analyze_color'), there's no indication of context, prerequisites, or exclusions. It's a generic statement that doesn't help an agent choose between similar tools.
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 of behavioral disclosure. It mentions 'high-quality' and 'professional' traits but lacks critical details: whether this is a read-only or mutating operation, any rate limits, authentication needs, error handling, or what the output looks like (e.g., file format details). For a tool with 10 parameters and no annotations, 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.
Conciseness5/5
Is the description appropriately sized, front-loaded, and free of redundancy?
The description is a single, efficient sentence that front-loads the core purpose without unnecessary words. It directly states what the tool does ('Generate high-quality PNG images of color palettes') and adds key features ('with professional layout and styling options'), making it easy to parse quickly.
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 (10 parameters, no annotations, no output schema), the description is incomplete. It doesn't address behavioral aspects like mutation risks, output format details, or usage context relative to siblings. For a tool that generates files with many options, more guidance is needed to ensure correct invocation.
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 description adds minimal meaning beyond the input schema, which has 100% coverage. It implies parameters like 'layout' and 'styling options' but doesn't elaborate on their semantics or interactions. With high schema coverage, the baseline is 3, as the schema already documents parameters well, but the description doesn't enhance understanding significantly.
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's purpose: 'Generate high-quality PNG images of color palettes with professional layout and styling options.' It specifies the verb ('Generate'), resource ('PNG images of color palettes'), and key characteristics ('high-quality,' 'professional layout and styling options'). However, it doesn't explicitly differentiate from sibling tools like 'create_palette_html' or 'create_color_comparison_png,' which prevents a perfect score.
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 doesn't mention sibling tools like 'create_palette_html' (for HTML output) or 'create_color_comparison_png' (for comparisons), nor does it specify prerequisites or exclusions. This leaves the agent without context for tool selection.
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 mentions generating HTML mockups but lacks details on behavioral traits: no information on output format (e.g., inline HTML, file), performance (e.g., generation time), side effects (e.g., if it creates files), or error handling. The description is minimal and doesn't compensate for missing annotations.
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, efficient sentence that front-loads the core purpose. It uses clear language ('Generate HTML theme preview mockups') without redundancy or fluff. Every word earns its place, making it easy to parse quickly.
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 (9 parameters, no annotations, no output schema), the description is insufficient. It doesn't explain what the HTML output contains (e.g., full page, embeddable snippet), how to use it, or any limitations. For a tool that generates visual content, more context on the result and its usability is needed.
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 fully documents all 9 parameters with descriptions and constraints. The description adds no parameter-specific information beyond implying 'theme_colors' and 'preview_type' are relevant. Baseline is 3 since the schema does the heavy lifting, but the description doesn't enhance understanding of parameters like 'interactive' or 'enable_accessibility_testing'.
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's purpose: 'Generate HTML theme preview mockups showing colors in realistic UI contexts.' It specifies the action (generate), output format (HTML mockups), and what they show (colors in UI contexts). However, it doesn't explicitly differentiate from sibling tools like 'create_color_wheel_html' or 'create_palette_html' which also generate HTML outputs, though the 'realistic UI contexts' aspect provides some distinction.
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 doesn't mention prerequisites, compare to sibling tools (e.g., 'create_color_wheel_html' for abstract visualizations vs. this for UI mockups), or specify ideal scenarios. The agent must infer usage from the purpose 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?
No annotations are provided, so the description carries the full burden of behavioral disclosure. While it mentions generating CSS with specific features, it doesn't describe what the output looks like (e.g., format, structure), whether it's a read-only operation, potential side effects, or performance considerations. For a tool with no annotations and no output schema, this leaves significant gaps in understanding how the tool behaves.
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, efficient sentence that front-loads the core purpose without unnecessary words. It directly states what the tool does ('Generate modern CSS') and key features, making it easy to parse. Every element earns its place, with no redundancy or fluff.
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 (7 parameters, no annotations, no output schema), the description is incomplete. It doesn't explain the output format, usage scenarios, or how parameters interact (e.g., the effect of 'minify' or 'semantic_names'). For a tool that generates CSS code, more context is needed to help an agent use it effectively without trial and error.
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 description mentions 'custom properties, utility classes, and fallbacks for color palettes,' which loosely maps to parameters like 'format' and 'include_fallbacks,' but doesn't add meaningful details beyond what the schema provides. With 100% schema description coverage, the baseline is 3, and the description doesn't compensate with additional context or examples for the 7 parameters.
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's purpose: 'Generate modern CSS with custom properties, utility classes, and fallbacks for color palettes.' It specifies the verb ('generate'), resource ('CSS'), and key features (custom properties, utility classes, fallbacks). However, it doesn't explicitly differentiate from sibling tools like 'export_scss' or 'export_tailwind' beyond mentioning CSS format.
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 doesn't mention when to choose 'export_css' over sibling tools like 'export_scss' or 'export_json', nor does it specify prerequisites or appropriate contexts for use. The agent must infer usage from the tool name and description 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 provided, the description carries the full burden of behavioral disclosure. It mentions what is generated but lacks details on output format, file creation, error handling, or any side effects. For a tool with 7 parameters and no annotations, this is insufficient to inform the agent adequately.
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, efficient sentence that directly states the tool's purpose without unnecessary words. It is front-loaded and appropriately sized, making it easy for an agent to parse quickly.
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 (7 parameters, no output schema, and no annotations), the description is incomplete. It doesn't address behavioral aspects, output details, or usage context, which are crucial for an agent to invoke the tool correctly in this environment.
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 schema description coverage is 100%, so the schema already documents all parameters thoroughly. The description adds no additional meaning beyond what the schema provides, such as explaining parameter interactions or use cases. This meets the baseline for high schema coverage.
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's purpose: 'Generate Tailwind CSS configuration, plugins, and utility classes for color palettes.' It specifies the verb ('generate') and resource ('Tailwind CSS configuration, plugins, and utility classes'), making the function evident. However, it doesn't explicitly differentiate from sibling tools like 'export_css' or 'export_json', which lowers it from a perfect score.
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 doesn't mention prerequisites, context for use, or compare it to sibling tools such as 'export_css' or 'export_json', leaving the agent without clear usage instructions.
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 of behavioral disclosure. It mentions the tool generates palettes based on harmony principles but doesn't describe output format, error handling, performance characteristics, or any constraints like rate limits. For a tool with 4 parameters and no annotations, this leaves significant gaps in understanding its behavior.
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 that front-loads the core purpose. It avoids redundancy and wastes no words, though it could be slightly more structured by separating harmony types with commas for clarity. Every part of the sentence contributes to understanding the tool's function.
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 (4 parameters, no annotations, no output schema), the description is incomplete. It doesn't explain what the output looks like (e.g., list of colors, format), how errors are handled, or any behavioral nuances. For a generative tool with multiple parameters, more context is needed to ensure proper usage by an AI agent.
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 all parameters thoroughly. The description adds minimal value beyond the schema by listing harmony types (complementary, triadic, analogous) as examples, but it doesn't provide additional context like how 'variation' affects results or default behaviors. Baseline 3 is appropriate as the schema does the heavy lifting.
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's purpose: 'Generate color palettes based on color theory harmony principles'. It specifies the action (generate) and resource (color palettes) with context about harmony types. However, it doesn't explicitly differentiate from sibling tools like 'generate_color_variations' or 'generate_theme', which might have overlapping functionality.
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. With many sibling tools for color generation and analysis (e.g., 'generate_color_variations', 'generate_theme', 'analyze_color'), there's no indication of specific use cases, prerequisites, or exclusions. Usage is implied through the mention of harmony principles but not explicitly stated.
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 provided, the description carries full burden for behavioral disclosure. It mentions 'CSS output' which hints at the return format, but doesn't describe what the CSS output looks like, whether it's a complete CSS rule or just the gradient value, error conditions, or performance characteristics. For a tool with 6 parameters and no output schema, 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.
Conciseness5/5
Is the description appropriately sized, front-loaded, and free of redundancy?
The description is a single, efficient sentence that states the core purpose without unnecessary words. It's appropriately sized for this tool and front-loads the essential information. Every word earns its place.
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 (6 parameters, mathematical operations, CSS generation) and the absence of both annotations and output schema, the description is incomplete. It doesn't explain what the tool returns (CSS string? complete rule?), error handling, or practical usage examples. The agent must rely heavily on the input schema alone.
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 all parameters thoroughly. The description adds no additional parameter semantics beyond what's in the schema. It mentions 'precise mathematical control' which vaguely relates to parameters like 'positions', 'angle', and 'interpolation', but provides no specific guidance. 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.
Purpose4/5
Does the description clearly state what the tool does and how it differs from similar tools?
The description clearly states the tool's purpose: 'Generate linear gradients with precise mathematical control and CSS output'. It specifies the verb ('generate'), resource ('linear gradients'), and output format ('CSS output'), though it doesn't explicitly distinguish it from sibling tools like 'generate_radial_gradient' or 'create_gradient_html'.
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 doesn't mention sibling tools like 'generate_radial_gradient' for different gradient types or 'create_gradient_html' for HTML output instead of CSS. The agent must infer usage from the tool name and parameters 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 provided, the description carries the full burden of behavioral disclosure. While it mentions 'CSS output' and 'precise mathematical control', it doesn't describe what the tool actually returns (CSS string? full CSS rule?), error conditions, performance characteristics, or any limitations. The phrase 'precise mathematical control' is vague and doesn't provide actionable behavioral information.
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 efficiently phrased in a single sentence with no wasted words. It's appropriately front-loaded with the core functionality. However, for a tool with 9 parameters and complex behavior, this extreme brevity might be insufficient rather than optimally concise.
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?
For a complex gradient generation tool with 9 parameters, no annotations, and no output schema, the description is inadequate. It doesn't explain what the output looks like (CSS rule format), doesn't mention error handling, and provides no examples or typical use cases. The lack of output schema means the description should compensate by explaining return values, which it doesn't do.
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 description adds no parameter-specific information beyond what's already comprehensively documented in the schema (100% coverage). While the schema thoroughly describes all 9 parameters with constraints, defaults, and enums, the description doesn't provide any additional context about parameter interactions, typical usage patterns, or practical examples.
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's function ('Generate radial gradients') and output format ('CSS output'), which distinguishes it from linear gradient tools. However, it doesn't explicitly differentiate from sibling tools like 'create_gradient_html' or 'create_gradient_png' that might also produce gradient outputs in different formats.
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. With sibling tools like 'generate_linear_gradient', 'create_gradient_html', and 'create_gradient_png' available, there's no indication of when radial gradients are preferable or when CSS output is needed versus other formats.
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 of behavioral disclosure. While 'generate' implies a creation operation, the description doesn't specify whether this is a read-only preview or a persistent creation, what permissions might be required, whether it's idempotent, or what the output format looks like. For a tool with 6 parameters and no output schema, this is a significant gap in 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.
Conciseness5/5
Is the description appropriately sized, front-loaded, and free of redundancy?
The description is a single, efficient sentence that communicates the core purpose without unnecessary words. It's appropriately sized for a tool with this complexity and gets straight to the point. Every word earns its place in conveying the tool's function.
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 (6 parameters, no annotations, no output schema), the description is insufficiently complete. It doesn't explain what 'complete design system themes' includes beyond colors, how the semantic mapping works, what the output looks like, or any behavioral characteristics. With rich sibling tools and no structured output information, users need more context to understand what this tool actually produces.
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 all 6 parameters with descriptions and enums. The description adds no specific parameter information beyond what's in the schema. The baseline of 3 is appropriate when the schema does the heavy lifting, though the description could have provided context about how parameters interact (e.g., how 'theme_type' affects 'accessibility_level').
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's purpose as 'Generate complete design system themes with semantic color mapping', which specifies the verb (generate), resource (design system themes), and key characteristic (semantic color mapping). However, it doesn't explicitly differentiate from sibling tools like 'generate_semantic_colors' or 'create_theme_preview_html', which appear related but have different scopes.
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. With many sibling tools related to colors, themes, and design systems (e.g., 'generate_semantic_colors', 'create_theme_preview_html', 'export_css'), there's no indication of when this comprehensive theme generation tool is appropriate versus more specialized tools. No prerequisites or exclusions are 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 carries the full burden. It mentions 'Supports various color spaces and blend modes' but doesn't disclose behavioral traits like whether the operation is read-only or mutative, what the output format is (e.g., color string, object), error handling, or performance considerations. For a tool with 4 parameters and no output schema, this leaves significant gaps in understanding how the tool behaves.
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 and front-loaded, with two sentences that directly state the tool's function and key features. There's no wasted text, and it efficiently communicates the core purpose. However, it could be slightly more structured by explicitly listing supported features or use cases.
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 of color mixing with 4 parameters, no annotations, and no output schema, the description is incomplete. It doesn't explain what the tool returns (e.g., a mixed color value), how errors are handled, or practical usage scenarios. For a tool in a server with many color-related siblings, more context is needed to guide effective use.
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 all parameters thoroughly. The description adds minimal value beyond the schema by mentioning 'specified ratios and blend modes' and 'various color spaces', but doesn't provide additional context like examples, constraints (e.g., color formats), or interactions between parameters. Baseline 3 is appropriate as the schema does the heavy lifting.
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's purpose: 'Mix multiple colors with specified ratios and blend modes.' It specifies the verb ('Mix'), resource ('colors'), and key parameters ('ratios and blend modes'). However, it doesn't explicitly differentiate from sibling tools like 'create_gradient_png' or 'generate_linear_gradient', which might also involve color mixing but for different outputs or purposes.
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 mentions 'different mixing effects' but doesn't specify use cases, prerequisites, or exclusions. Given the many sibling tools for color manipulation, the agent lacks explicit direction on selecting this tool over others for mixing tasks.
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 of behavioral disclosure. While it mentions 'preserving hue when possible,' it doesn't describe what 'optimize' entails operationally (e.g., does it modify colors algorithmically, return suggestions, or apply transformations?), what permissions or inputs are needed, or what the output looks like. For a tool with 5 parameters and no annotations, 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.
Conciseness5/5
Is the description appropriately sized, front-loaded, and free of redundancy?
The description is a single, efficient sentence that states the core purpose without unnecessary words. It's appropriately sized and front-loaded with the essential information, making it easy to parse quickly.
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 (5 parameters, no annotations, no output schema), the description is incomplete. It doesn't explain what 'optimize' means in practice, what the tool returns, or how it differs from sibling accessibility tools. For a color optimization tool with multiple parameters, more context is needed to guide effective use.
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 all parameters thoroughly. The description mentions 'preserving hue when possible,' which aligns with the 'preserve_hue' parameter but doesn't add meaningful semantic context beyond what's in the schema descriptions. Baseline 3 is appropriate when the schema does the heavy lifting.
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's purpose: 'Optimize colors for accessibility compliance while preserving hue when possible.' It specifies the action (optimize), resource (colors), and goal (accessibility compliance). However, it doesn't explicitly differentiate from sibling tools like 'check_contrast' or 'simulate_colorblindness' which also relate to accessibility.
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. With many sibling tools related to color analysis and accessibility (e.g., 'check_contrast', 'simulate_colorblindness'), there's no indication of when this optimization tool is preferred over those other options or what specific scenarios it addresses.
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 of behavioral disclosure. It states the tool simulates color appearances but doesn't explain what the simulation outputs (e.g., transformed colors, visual previews), whether it's a read-only operation, or any side effects like rate limits or authentication needs. For a tool with no annotations, this is a significant gap in 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, clear sentence that efficiently conveys the core purpose without unnecessary details. It's front-loaded and wastes no words, making it easy for an agent to parse quickly.
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 lack of annotations and output schema, the description is incomplete. It doesn't explain what the tool returns (e.g., modified colors, error messages) or behavioral aspects like performance or limitations. For a tool with 3 parameters and no structured output information, the description should provide more context to guide effective use.
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 all parameters ('colors', 'type', 'severity') with descriptions and constraints. The description doesn't add any meaning beyond what the schema provides, such as explaining the 'type' enum values or how 'severity' affects the simulation. Baseline 3 is appropriate when the schema does the heavy lifting.
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's purpose: 'Simulate how colors appear to users with color vision deficiencies.' It specifies the verb 'simulate' and the resource 'colors,' making it easy to understand. However, it doesn't explicitly differentiate from sibling tools like 'check_contrast' or 'optimize_for_accessibility,' which are related to color accessibility but serve different functions.
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 doesn't mention sibling tools or contexts where this simulation is preferred over other color analysis tools, such as 'analyze_color' or 'check_contrast.' This lack of usage context leaves the agent to infer based on tool 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?
No annotations are provided, so the description carries full burden. It mentions 'high precision' and 'comprehensive format support' which are useful behavioral traits, but doesn't disclose important details like error handling, performance characteristics, rate limits, or what happens with invalid inputs. For a tool with no annotations, this leaves significant behavioral gaps.
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, efficient sentence that clearly states the core functionality. It's appropriately sized for a straightforward conversion tool and wastes no words on redundant 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 conversion tool with comprehensive schema documentation but no output schema and no annotations, the description provides basic context but lacks important details. It doesn't explain what the output looks like, how errors are handled, or provide examples of conversion results. Given the rich parameter schema, the description feels somewhat minimal.
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 schema already documents all 4 parameters thoroughly. The description doesn't add meaningful parameter semantics beyond what's in the schema - it doesn't explain relationships between parameters or provide usage examples that go beyond the schema's examples and descriptions.
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's purpose: converting colors between formats with high precision and comprehensive format support. It specifies the verb ('convert') and resource ('colors'), but doesn't explicitly differentiate from sibling tools like 'analyze_color' or 'mix_colors' which have different functions.
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 is provided about when to use this tool versus alternatives. With many sibling tools for color analysis, generation, and export, the description doesn't indicate whether this is for format conversion specifically versus other color operations, leaving the agent to infer usage context.
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 of behavioral disclosure. While it mentions 'high-quality' and 'various styles and effects,' it doesn't address critical behavioral aspects like whether this is a read-only operation, what happens on failure, performance characteristics, or output format details. For a tool that generates images with multiple parameters, 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.
Conciseness5/5
Is the description appropriately sized, front-loaded, and free of redundancy?
The description is a single, efficient sentence that front-loads the core purpose. Every word earns its place: 'Generate' (action), 'high-quality PNG images' (output type and quality), 'of gradients' (subject), 'with various styles and effects' (capabilities). There's no wasted verbiage or redundancy.
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 (6 parameters with nested objects, no output schema, no annotations), the description is minimally adequate but incomplete. It identifies what the tool does but doesn't address behavioral aspects, usage context, or output expectations. For a tool that generates visual content with multiple configuration options, more guidance would be helpful despite the good schema coverage.
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 83%, which is high, so the baseline is 3. The description adds minimal value beyond the schema - it mentions 'various styles and effects' which loosely relates to the 'effects' parameter, but doesn't provide additional semantic context about how parameters interact or what constitutes 'high-quality' in relation to the quality parameter. The schema already documents parameters well.
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's purpose: 'Generate high-quality PNG images of gradients with various styles and effects.' It specifies the verb ('Generate'), resource ('PNG images of gradients'), and quality attributes. However, it doesn't explicitly differentiate from sibling tools like create_gradient_html or create_palette_png, which would be needed for a perfect score.
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. With many sibling tools for creating gradients and other color-related outputs (e.g., create_gradient_html, create_palette_png, generate_linear_gradient), there's no indication of when PNG output is preferred over HTML or when this tool should be chosen over more specific gradient generators.
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 of behavioral disclosure. It states the tool 'generates' SCSS code, implying a read-only output operation, but doesn't clarify if it modifies any state, requires specific permissions, has rate limits, or what the output format looks like (e.g., file, string). For a tool with no annotations, this leaves significant gaps in understanding its behavior.
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, efficient sentence that front-loads the core purpose without unnecessary words. It directly states what the tool does ('Generate SCSS variables, maps, and mixins') and the context ('for color palettes with utility functions'), with zero waste or redundancy.
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 (7 parameters, no output schema, no annotations), the description is minimally adequate. It covers the purpose but lacks behavioral details, usage guidelines, and output information. With no annotations or output schema, the description should do more to compensate, but it only meets the bare minimum for understanding what the tool produces.
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%, meaning all parameters are documented in the schema itself. The description doesn't add any parameter-specific details beyond what's in the schema (e.g., it doesn't explain how 'colors' array maps to SCSS output or what 'utility functions' entail). With high schema coverage, the baseline score of 3 is appropriate, as the description doesn't compensate but doesn't need to.
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's purpose: 'Generate SCSS variables, maps, and mixins for color palettes with utility functions.' It specifies the verb ('generate'), resource ('SCSS variables, maps, and mixins'), and context ('color palettes with utility functions'). However, it doesn't explicitly distinguish this from sibling tools like 'export_css' or 'export_json' beyond mentioning SCSS format.
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 doesn't mention sibling tools like 'export_css' or 'export_json' for comparison, nor does it specify prerequisites, constraints, or typical use cases. The agent must infer usage from the purpose 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?
No annotations are provided, so the description carries the full burden of behavioral disclosure. It mentions 'accessibility compliance' but doesn't specify what that entails (e.g., WCAG standards, contrast ratios, or error handling). It lacks details on output format, performance, rate limits, or side effects. For a tool with 5 parameters and no annotations, 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.
Conciseness5/5
Is the description appropriately sized, front-loaded, and free of redundancy?
The description is a single, efficient sentence with zero waste. It's front-loaded with the core purpose and includes key context ('UI design with accessibility compliance'). Every word earns its place, making it highly concise and well-structured.
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 5 parameters, no annotations, and no output schema, the description is moderately complete. It covers the high-level purpose but lacks details on behavior, output, or usage compared to siblings. For a tool with this complexity, more context would be helpful, but it meets minimum viability.
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 all parameters thoroughly. The description adds no specific parameter semantics beyond what's in the schema (e.g., it doesn't explain how 'base_palette' maps to 'semantic_roles' or what 'context' affects). Baseline 3 is appropriate as the schema does the heavy lifting.
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's purpose: 'Map colors to semantic roles for UI design with accessibility compliance.' It specifies the verb ('map'), resource ('colors to semantic roles'), and domain ('UI design with accessibility compliance'). However, it doesn't explicitly differentiate from sibling tools like 'generate_theme' or 'optimize_for_accessibility', which might have overlapping functionality in color/theme generation.
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 doesn't mention sibling tools or contexts where other tools might be more appropriate (e.g., 'generate_theme' for broader theme generation or 'optimize_for_accessibility' for accessibility-focused adjustments). Usage is implied through the description but not explicitly stated.
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 provided, the description carries the full burden of behavioral disclosure. While it mentions 'interactive controls' and 'CSS code display,' it doesn't describe what the tool actually produces (e.g., a complete HTML page, an embeddable component, or raw HTML markup). It also doesn't mention whether this is a read-only visualization tool or if it has any side effects, performance characteristics, or authentication requirements.
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 that communicates the core functionality. It's appropriately sized for the tool's complexity and gets straight to the point without unnecessary elaboration. However, it could be slightly more structured by separating the visualization aspect from the interactive features for better clarity.
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 10 parameters and no output schema, the description is somewhat incomplete. While the schema provides excellent parameter documentation, the description doesn't explain what the tool returns (HTML content, a URL, a file?) or how the output should be used. Given the complexity of the tool and the absence of both annotations and output schema, the description should provide more context about the tool's behavior and output format.
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 schema description coverage is 100%, meaning all parameters are well-documented in the schema itself. The description adds minimal value beyond what's already in the schema - it mentions 'CSS code display' which relates to show_css_code, and 'interactive controls' which relates to interactive_controls and enable_background_controls, but doesn't provide additional semantic context about how these parameters work together or their practical implications.
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 specific action ('Generate HTML gradient preview visualizations') and resources involved ('CSS code display and interactive controls'). It distinguishes this tool from sibling tools like create_gradient_png (which outputs PNG) and create_color_wheel_html (which focuses on color wheels rather than gradients).
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 doesn't mention when this HTML visualization tool is preferable over create_gradient_png for static images, or how it relates to other gradient tools like generate_linear_gradient or generate_radial_gradient. No context about appropriate use cases or limitations is 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 provided, the description carries the full burden of behavioral disclosure. It mentions 'interactive HTML visualizations' and 'accessibility features,' but fails to detail critical behaviors like output format (e.g., HTML string or file), error handling, performance characteristics, or any side effects. This leaves significant gaps for a tool with 15 parameters and complex functionality.
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 efficiently conveys the core purpose and key features without unnecessary words. It is front-loaded with the main action and resource, making it easy to parse and understand quickly.
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 (15 parameters, no annotations, no output schema), the description is insufficient. It omits details on output (e.g., HTML string, file path), behavioral traits (e.g., interactivity implementation, error handling), and usage scenarios, leaving the agent under-informed for effective tool invocation in a rich sibling tool environment.
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 description adds no parameter-specific information beyond what the input schema provides, which has 100% schema description coverage. It mentions 'multiple layout options' and 'accessibility features,' hinting at parameters like layout and accessibility_info, but offers no additional syntax, format details, or usage context. The baseline score of 3 reflects adequate schema coverage without description enhancement.
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 specific action ('Generate interactive HTML visualizations') and resource ('color palettes'), with additional features ('accessibility features and multiple layout options') that distinguish it from sibling tools like create_palette_png or create_color_wheel_html, which produce different output formats or visualizations.
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, such as create_palette_png for static images or create_gradient_html for gradient visualizations. It lacks explicit context, prerequisites, or exclusions, leaving the agent to infer usage from the tool name and parameters 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 provided, the description carries the full burden of behavioral disclosure. It mentions interactivity and harmony highlighting but doesn't describe what the HTML output contains, whether it's standalone or embeddable, performance characteristics, or any limitations. For a tool generating interactive HTML with 10 parameters, 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.
Conciseness5/5
Is the description appropriately sized, front-loaded, and free of redundancy?
The description is a single, efficient sentence that front-loads the core purpose ('generate interactive HTML color wheel visualizations') and adds key features ('with harmony highlighting and color selection') without any wasted words. Every part earns its place.
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 10 parameters, no annotations, and no output schema, the description is minimally adequate. It states what the tool does but lacks crucial context about the HTML output format, interactivity details, or usage scenarios. The high parameter count and absence of structured behavioral hints make this incomplete for effective agent use.
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 all 10 parameters thoroughly. The description adds no parameter-specific information beyond what's in the schema, such as explaining how harmony relationships are visualized or what interactive features are included. Baseline 3 is appropriate when schema does all the work.
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 with specific verbs ('generate interactive HTML color wheel visualizations') and resources ('color wheel'), distinguishing it from siblings like create_gradient_html or create_palette_html by focusing on wheel visualizations with harmony highlighting and color selection.
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 doesn't mention when to choose it over other visualization tools like create_color_comparison_png or create_palette_html, or when harmony highlighting is beneficial versus other features.
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 provided, the description carries full burden but only explains the conceptual approach ('tints add white, shades add black, tones add gray'). It doesn't disclose behavioral traits like output format, whether it's deterministic, performance characteristics, or error handling for invalid base colors.
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 perfectly concise with two sentences that each earn their place: the first states the core function, the second explains the three variation types. No wasted words and front-loaded with the main purpose.
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 4 parameters, 100% schema coverage, but no annotations or output schema, the description is minimally adequate. It explains what the tool does conceptually but lacks information about output format, error conditions, or practical usage examples that would help an agent use it effectively.
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 some context by explaining what tints, shades, and tones mean conceptually, but doesn't provide additional parameter semantics beyond what's already documented in the schema 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 with specific verbs ('generate tints, shades, and tones') and resource ('base color'), and distinguishes it from siblings by focusing on mathematical color variation generation rather than analysis, conversion, or export functions.
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 like 'generate_harmony_palette', 'mix_colors', or other color generation siblings. It explains what the tool does but not when it's the appropriate choice.
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 mentions sorting and optional grouping, but does not disclose behavioral traits such as input validation (e.g., color format requirements), error handling, performance characteristics, or output format. For a tool with no annotation coverage, this leaves significant gaps in understanding how it behaves.
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 appropriately sized and front-loaded, consisting of two concise sentences that directly state the tool's function and optional feature. Every sentence earns its place by conveying essential information without redundancy or fluff.
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 of sorting with multiple properties and grouping, no annotations, and no output schema, the description is incomplete. It lacks details on output format (e.g., sorted array structure), error cases, or behavioral nuances, which are critical for an agent to use the tool effectively without structured guidance.
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 all parameters thoroughly. The description adds minimal value by listing sortable properties and mentioning grouping, but does not provide additional semantics beyond what the schema specifies (e.g., how 'group_similar' works or what 'frequency' means). Baseline 3 is appropriate as the 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 with specific verbs ('sort colors') and resources ('by various properties'), and distinguishes it from siblings by focusing on sorting rather than analysis, conversion, generation, or export. It explicitly mentions the sortable properties (hue, saturation, etc.) and optional grouping, making the purpose highly specific and differentiated.
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 by listing sortable properties and mentioning optional grouping, but does not explicitly state when to use this tool versus alternatives (e.g., when to sort vs. analyze or generate colors). It provides some context but lacks explicit guidance on exclusions or comparisons to sibling tools.
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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