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Glama

Server Details

Screenshot and HTML render MCP server for AI agents

Status
Healthy
Last Tested
Transport
Streamable HTTP
URL

Glama MCP Gateway

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MCP client
Glama
MCP server

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Usage analytics

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Tool DescriptionsA

Average 4.3/5 across 3 of 3 tools scored.

Server CoherenceB
Disambiguation2/5

The screenshot and screenshot_one_liner tools have significant overlap; screenshot_one_liner is just a simplified version of screenshot with fixed defaults. An agent could easily misselect between them, especially if the simpler name seems more appropriate but lacks needed options.

Naming Consistency3/5

render and screenshot follow a simple verb pattern, but screenshot_one_liner breaks this by adding a compound name with underscores. The inconsistency is minor but noticeable.

Tool Count4/5

Three tools is a reasonable count for a focused screenshot/rendering service. It's not overly sparse, but the overlap between two screenshot tools suggests that two could be merged, making the count slightly padded.

Completeness3/5

The tool set covers basic rendering and screenshot needs, but there are gaps: no support for other output formats (e.g., PDF), no mobile viewport emulation, and the duplication of screenshot tools creates an unclear workflow. The domain is narrow, so completeness is adequate but not excellent.

Available Tools

3 tools
renderAInspect

Render HTML/CSS code as an image. Turn any markup into a visual preview.

Useful for: previewing UI code, checking CSS layouts, turning design mockups into shareable images.
Supports <style> tags, inline CSS, and common HTML features.
Output is auto-cropped to content — no wasted blank space below.

Args:
    html: The HTML/CSS code to render
    width: Viewport width in pixels (default: 1280)
    height: Viewport height in pixels — output auto-cropped to content (default: 720)
    format: Image format — "jpeg" saves tokens, "png" for crisp text, "webp" smallest (default: "jpeg")
ParametersJSON Schema
NameRequiredDescriptionDefault
htmlYes
widthNo
formatNojpeg
heightNo

Output Schema

ParametersJSON Schema
NameRequiredDescription
resultYes
Behavior4/5

Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?

Despite no annotations, the description discloses important behaviors: auto-cropping to content, support for HTML features, and format-specific trade-offs (jpeg saves tokens, png crisp, webp smallest).

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?

Well-structured: one-line purpose, bullet-like list of uses, then parameter explanations. Front-loaded and every sentence adds value.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Completeness5/5

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

Covers all parameters, provides behavioral details, and includes output schema existence. No apparent gaps given the tool's complexity.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Parameters5/5

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

The description adds significant meaning to all 4 parameters: html, width, height (with auto-crop note), and format (with recommendations). Schema coverage is 0%, so description fully compensates.

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 renders HTML/CSS code as an image, and explicitly mentions use cases like previewing UI code and design mockups, which differentiate it from screenshot tools.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Usage Guidelines4/5

Does the description explain when to use this tool, when not to, or what alternatives exist?

Provides clear use cases (previewing, checking layouts, turning designs into images) and lists supported features, but does not explicitly state when not to use or compare to sibling tools.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.

screenshotAInspect

Capture a webpage screenshot with full control over viewport, format, and element selection.

Args:
    url: The URL to screenshot
    width: Viewport width in pixels (default: 1280)
    height: Viewport height in pixels (default: 720)
    fullpage: Capture the entire scrollable page instead of just the viewport (default: false)
    format: Image format — "jpeg" saves tokens (~50KB), "png" for quality, "webp" smallest (default: "jpeg")
    block_ads: Remove ads and cookie banners (default: true)
    wait_for: CSS selector to wait for before capturing, e.g. ".main-content" to ensure content loaded
    selector: CSS selector to capture only a specific element, e.g. ".hero" or "#pricing-table"
ParametersJSON Schema
NameRequiredDescriptionDefault
urlYes
widthNo
formatNojpeg
heightNo
fullpageNo
selectorNo
wait_forNo
block_adsNo

Output Schema

ParametersJSON Schema
NameRequiredDescription
resultYes
Behavior4/5

Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?

With no annotations, the description provides useful behavioral context: format size implications (JPEG ~50KB), ad blocking, waiting for selectors, and element selection. It does not mention auth, rate limits, or error handling, but the key behaviors are transparent.

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 concise: one introductory sentence followed by a bullet list of parameters. Each line is informative and no extraneous text. Front-loaded with the main purpose.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Completeness4/5

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

Given 8 parameters, no annotations, and existing output schema, the description covers all parameter behaviors. It lacks mention of error handling or return format, but the output schema likely provides that. Minor gap.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Parameters5/5

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

Schema coverage is 0%, so the description carries full burden. It explains all 8 parameters with examples and context (e.g., 'JPEG saves tokens (~50KB)', 'wait_for: .main-content'). This adds substantial meaning beyond the bare schema.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Purpose5/5

Does the description clearly state what the tool does and how it differs from similar tools?

The description clearly states 'Capture a webpage screenshot with full control over viewport, format, and element selection.' This distinguishes it from sibling tools like 'screenshot_one_liner' (which is likely simpler) and 'render' (possibly different rendering).

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Usage Guidelines3/5

Does the description explain when to use this tool, when not to, or what alternatives exist?

The description implies usage for full control but does not explicitly state when to use this tool vs alternatives like 'render' or 'screenshot_one_liner'. No when-not-to-use guidance or mention of prerequisites.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.

screenshot_one_linerAInspect

Capture a webpage as a JPEG screenshot. The simplest way to see what a webpage looks like.

Use this when you need to quickly check a webpage's appearance, verify a design, or see content that requires rendering.
Returns a 1280x720 JPEG image (~50KB) with ads blocked.

Args:
    url: The URL to screenshot (e.g. "https://example.com")
ParametersJSON Schema
NameRequiredDescriptionDefault
urlYes

Output Schema

ParametersJSON Schema
NameRequiredDescription
resultYes
Behavior3/5

Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?

With no annotations provided, the description carries the full burden. It discloses that the output is a 1280x720 JPEG image (~50KB) and that ads are blocked. However, it does not mention potential limitations such as page load timeouts, JavaScript execution, or error handling for inaccessible URLs.

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 concise with two short paragraphs and an Args section. Every sentence adds value: purpose, when to use, output details, and parameter format. There is no redundant or waste language.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Completeness4/5

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

For a simple tool with one parameter and no annotations, the description covers purpose, usage context, output format, and ad blocking. It lacks details on error behavior and limitations, but given the tool's simplicity, it is largely complete.

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 has 0% description coverage for the single parameter 'url'. The description adds an example format ('e.g. https://example.com') and clarifies it is a URL, which is basic but helpful. For a single required parameter, this is adequate but minimal.

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 action ('Capture a webpage as a JPEG screenshot'), the resource ('webpage'), and provides specific details about the output (1280x720, ~50KB, ads blocked), distinguishing it from sibling tools by emphasizing simplicity.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Usage Guidelines4/5

Does the description explain when to use this tool, when not to, or what alternatives exist?

The description explicitly states when to use this tool ('quickly check a webpage's appearance, verify a design, or see content that requires rendering'), providing clear usage context. However, it does not offer explicit when-not-to-use scenarios or direct comparisons with 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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