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

The description adds minimal behavioral context beyond annotations. Annotations already indicate destructiveHint=true (modifies page state) and readOnlyHint=false (not read-only), which aligns with 'perform click' implying interaction. However, the description doesn't elaborate on what 'perform click' entails (e.g., triggering events, navigation) or mention potential side effects like page changes, which would be valuable given the destructive nature. No contradiction with annotations exists.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Is the description appropriately sized, front-loaded, and free of redundancy?

The description is extremely concise with a single sentence ('Perform click on a web page'), which is front-loaded and wastes no words. Every part of the sentence directly contributes to understanding the tool's purpose without redundancy or unnecessary elaboration.

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

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

Given the tool's complexity (destructive interaction with 5 parameters) and lack of output schema, the description is minimally adequate. Annotations cover safety aspects (destructive, not read-only), but the description doesn't address return values or error conditions. For a tool that modifies page state, more context on outcomes would be beneficial, though annotations provide some baseline.

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

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

Schema description coverage is 100%, so parameters are fully documented in the schema. The description adds no additional meaning about parameters beyond the schema's details (e.g., element and ref requirements, button options). It doesn't explain why both element and ref are needed or how they interact, leaving the schema to carry the full burden.

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

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

The description clearly states the action ('perform click') and resource ('on a web page'), making the purpose immediately understandable. It distinguishes itself from siblings like browser_hover, browser_press_key, and browser_drag by specifying clicking rather than hovering, typing, or dragging. However, it doesn't explicitly differentiate from all siblings (e.g., browser_select_option might also involve clicking).

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

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 click over other interaction methods like browser_type or browser_press_key, nor does it specify prerequisites (e.g., needing a page snapshot first). The context is implied 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.

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

Annotations indicate destructiveHint=true and readOnlyHint=false, which the description aligns with by implying a destructive close operation. The description adds value by specifying 'the page' as the target, clarifying scope beyond what annotations provide. However, it doesn't mention potential side effects like data loss or confirmation dialogs, which would enhance transparency for a destructive tool.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Is the description appropriately sized, front-loaded, and free of redundancy?

The description is a single, clear sentence with zero wasted words. It's front-loaded with the core action ('Close') and immediately specifies the target ('the page'), making it highly efficient. 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.

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

Given the tool's destructive nature (per annotations) and lack of output schema, the description is minimally adequate. It covers the basic action but doesn't address implications like what happens after closing (e.g., browser state, return values) or error conditions. For a destructive tool with no output schema, more context would improve completeness.

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

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

With 0 parameters and 100% schema description coverage, the baseline is 4. The description doesn't need to explain parameters, and it efficiently states the action without redundancy. No additional parameter context is required or provided, which is appropriate for a parameterless tool.

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

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

The description 'Close the page' clearly states the action (close) and target (the page), making the purpose immediately understandable. It distinguishes from siblings like browser_navigate or browser_tabs by focusing on termination rather than navigation or tab management. However, it doesn't specify if it closes the current tab or entire browser, 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.

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

No guidance is provided on when to use this tool versus alternatives. The description doesn't mention prerequisites (e.g., requires an open page), exclusions (e.g., don't use if unsaved changes exist), or sibling tools that might be relevant (like browser_tabs for tab management). This leaves the agent with minimal context for decision-making.

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

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

Annotations provide readOnlyHint=true, destructiveHint=false, and openWorldHint=true, indicating a safe, read-only operation with potential for varied data. The description adds minimal behavioral context beyond this—it specifies 'all console messages' but doesn't detail format, pagination, or real-time vs. cached retrieval. Since annotations cover safety, the description earns a baseline score for not contradicting them, though it could offer more operational insight.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Is the description appropriately sized, front-loaded, and free of redundancy?

The description 'Returns all console messages' is a single, front-loaded sentence with zero waste—it directly states the core function without fluff. It's appropriately sized for a simple tool, making it easy for an agent to parse quickly and efficiently.

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

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

Given the tool's low complexity (1 optional parameter), high schema coverage (100%), and annotations covering safety, the description is minimally adequate. However, without an output schema, it doesn't explain return values (e.g., message format, timestamps), leaving a gap. For a read-only tool with good annotations, it's passable but could be more informative about results.

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

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

Schema description coverage is 100%, with the 'level' parameter fully documented in the schema (enum, default, description). The description adds no parameter-specific information beyond implying retrieval of messages, which the schema already covers. This meets the baseline of 3, as the schema handles parameter semantics adequately without extra description input.

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

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

The description 'Returns all console messages' clearly states the verb ('Returns') and resource ('console messages'), making the purpose understandable. However, it doesn't explicitly differentiate from sibling tools like browser_network_requests or browser_run_code, which also retrieve browser data but different types. The title annotation 'Get console messages' reinforces this, but the description itself lacks sibling distinction.

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

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 (e.g., needing an active browser session), exclusions, or comparisons to siblings like browser_network_requests for network logs. Without such context, an agent might struggle to choose appropriately among the many browser-related tools.

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

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

Annotations provide key behavioral hints: destructiveHint=true (indicating potential changes), readOnlyHint=false (confirms it's a mutation), and openWorldHint=true (suggests dynamic environment). The description adds minimal context beyond this, stating the action but not elaborating on effects like UI state changes or error conditions. No contradiction with annotations exists.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

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 wastes no space, making it easy to parse quickly.

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

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

Given the complexity of a drag-and-drop operation in a browser context, the description is minimal. Annotations cover safety and environment aspects, but no output schema exists, and the description doesn't address return values, error handling, or interaction nuances. It's adequate but leaves gaps for a tool with destructive potential.

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

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

Schema description coverage is 100%, with clear documentation for all four parameters (startElement, startRef, endElement, endRef). The description adds no additional parameter semantics, such as explaining the relationship between 'element' and 'ref' parameters or usage examples. Baseline score of 3 is appropriate given high schema coverage.

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

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

The description clearly states the action ('perform drag and drop') and specifies the relationship ('between two elements'), which is more specific than just the tool name. However, it doesn't explicitly differentiate from sibling tools like browser_click or browser_hover that also involve element interaction, though the drag-and-drop action is distinct.

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

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 browser_click or browser_hover for similar element interactions. It lacks context about prerequisites (e.g., needing element references from a snapshot) or scenarios where drag-and-drop is appropriate over other methods.

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

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

The description doesn't contradict annotations. Annotations indicate this is a destructive, non-read-only operation with open-world characteristics. The description adds context by specifying it evaluates JavaScript on 'page or element,' which helps clarify the scope beyond what annotations provide. However, it doesn't detail potential side effects like page modifications or security implications.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Is the description appropriately sized, front-loaded, and free of redundancy?

The description is extremely concise—a single, clear phrase with no wasted words. It's front-loaded with the core functionality, making it easy to understand at a glance without unnecessary elaboration.

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

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

Given the tool's complexity (JavaScript evaluation in a browser with destructive potential) and lack of output schema, the description is minimal. It covers the basic purpose but doesn't address return values, error handling, or security considerations, leaving gaps for an AI agent to infer behavior in a potentially risky operation.

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

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 three parameters thoroughly. The description adds minimal value beyond the schema by implying the 'element' parameter is optional (evaluating on 'page or element'), but doesn't provide additional syntax or usage details. 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.

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

The description clearly states the action ('evaluate') and target ('JavaScript expression on page or element'), distinguishing it from sibling tools that perform physical interactions like click, type, or navigate. However, it doesn't specify that this is for browser automation contexts, which is implied but could be more explicit.

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

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 that this is for executing custom JavaScript code in a browser context, nor does it differentiate from other browser tools like browser_console_messages (for reading console output) or browser_snapshot (for capturing page state).

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

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

Annotations indicate destructiveHint=true and openWorldHint=true, which the description doesn't contradict. It adds that uploading can involve 'one or multiple files' and implies a file chooser fallback if paths omitted, providing some behavioral context beyond annotations. However, it lacks details on permissions, rate limits, or specific effects of the destructive operation.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Is the description appropriately sized, front-loaded, and free of redundancy?

The description is a single, efficient sentence with no wasted words. It's front-loaded with the core action and resource, making it highly concise and well-structured for quick understanding.

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

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

Given the tool's complexity (destructive operation with open-world hint), no output schema, and rich annotations, the description is adequate but incomplete. It covers the basic purpose but lacks context on when to use, error handling, or output expectations, leaving gaps for an agent to infer.

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

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

Schema description coverage is 100%, with the parameter 'paths' fully documented in the schema. The description adds minimal semantics by implying the tool handles multiple files, but this is already covered in the schema's description. Baseline 3 is appropriate as the schema carries the burden.

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

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

The description 'Upload one or multiple files' clearly states the action (upload) and resource (files), and distinguishes from sibling tools like browser_click or browser_navigate. However, it doesn't specify the upload destination or context (e.g., to a browser session), which would make it more specific.

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

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

No guidance on when to use this tool versus alternatives is provided. It doesn't mention prerequisites (e.g., needing an active browser session), nor does it differentiate from potential non-browser upload tools. The description alone offers no usage context.

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

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

Annotations indicate this is a destructive, non-read-only operation with open-world hints, which the description aligns with by implying mutation ('fill'). The description adds value by specifying 'multiple form fields,' suggesting batch capability, though it lacks details on error handling, side effects, or dependencies. No contradiction with annotations exists.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Is the description appropriately sized, front-loaded, and free of redundancy?

The description is extremely concise with a single phrase, 'Fill multiple form fields,' which is front-loaded and wastes no words. It efficiently conveys the core action, though this brevity contributes to gaps in other dimensions.

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

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

Given the complexity of a destructive tool with no output schema and rich annotations, the description is incomplete. It doesn't explain return values, error conditions, or how it integrates with sibling tools (e.g., browser_snapshot for 'ref' values). For a tool that modifies browser state, more context is needed to guide safe and effective use.

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

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 the 'fields' parameter and its nested properties. The description adds no additional meaning beyond implying batch processing ('multiple'), which is already clear from the array type in the schema. Baseline 3 is appropriate as the schema handles parameter documentation.

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

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

The description 'Fill multiple form fields' states the action (fill) and resource (form fields), but is vague about scope and differentiation. It doesn't specify whether this is for web forms, desktop applications, or other contexts, nor how it differs from sibling tools like browser_type or browser_select_option that also interact with form elements.

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

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

No guidance is provided on when to use this tool versus alternatives. The description doesn't mention prerequisites (e.g., needing a browser session or page snapshot), nor does it compare to similar tools like browser_type (for text input) or browser_select_option (for dropdowns), leaving the agent to guess based on context.

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

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

Annotations provide readOnlyHint=false, openWorldHint=true, and destructiveHint=true, indicating this is a mutable, open-ended, and potentially destructive operation. The description doesn't contradict these annotations, but it adds minimal context beyond them—it vaguely implies interaction with dialogs without detailing what 'handle' entails (e.g., accepting/dismissing, providing input). For a tool with annotations covering safety and scope, the description adds some value but lacks rich behavioral details like side effects or error conditions.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Is the description appropriately sized, front-loaded, and free of redundancy?

The description is extremely concise with just three words, front-loaded and free of unnecessary information. Every word ('Handle a dialog') directly relates to the tool's function, though it's under-specified. There's no wasted text, making it efficient in structure despite its content gaps.

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

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

Given the tool's complexity (handling dialogs with potential destruction), lack of output schema, and rich annotations, the description is incomplete. It doesn't explain what a 'dialog' is in this context, what happens when accepted or dismissed, or the return behavior. The annotations provide safety hints, but the description fails to add necessary context for effective use, leaving significant gaps in understanding.

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

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

Schema description coverage is 100%, with clear documentation for both parameters: 'accept' (boolean for accepting the dialog) and 'promptText' (string for prompt dialog text). The description adds no meaning beyond the schema—it doesn't explain how these parameters interact or provide examples of usage. Given the high schema coverage, the baseline score of 3 is appropriate, as the schema handles parameter documentation adequately.

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

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

The description 'Handle a dialog' is a tautology that restates the tool name without specifying what 'handle' means or what type of dialog is involved. It doesn't distinguish this tool from sibling browser tools like browser_click or browser_press_key, which also handle interactions. The description lacks a specific verb-resource combination that clarifies the action.

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

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 what triggers a dialog (e.g., alerts, prompts, confirmations) or when other tools like browser_click might be more appropriate. There's no context about prerequisites or exclusions, leaving the agent with no usage direction.

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

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

Annotations provide key behavioral hints: readOnlyHint=false, openWorldHint=true, and destructiveHint=true, indicating this is a mutable, open-world operation with potential destructive effects. The description adds minimal context beyond this, as 'Hover over element on page' doesn't disclose additional traits like what 'destructive' entails (e.g., unintended page changes) or any rate limits. It doesn't contradict annotations, but offers little extra insight, meeting the lower bar with annotations present.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Is the description appropriately sized, front-loaded, and free of redundancy?

The description 'Hover over element on page' is extremely concise and front-loaded, consisting of a single, direct sentence that immediately conveys the core action. There is no wasted language or unnecessary elaboration, making it efficient for quick understanding without sacrificing clarity.

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

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

Given the tool's moderate complexity (interactive browser action with destructive potential), the description is minimal but adequate when combined with annotations and a well-documented schema. It lacks output schema or details on return values, but annotations cover safety and world hints. The description could be more complete by explaining hover effects or prerequisites, but it meets basic needs without being misleading.

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

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

Schema description coverage is 100%, with clear descriptions for both parameters: 'element' as a human-readable description for permission and 'ref' as an exact target reference. The description adds no parameter-specific information beyond what the schema provides, such as examples or usage notes. Given the high schema coverage, the baseline score of 3 is appropriate, as the description doesn't compensate but also doesn't detract.

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

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

The description 'Hover over element on page' clearly states the action (hover) and target (element on page), making the purpose immediately understandable. It distinguishes itself from siblings like 'browser_click' or 'browser_type' by specifying a hover interaction rather than click or typing. However, it doesn't explicitly differentiate from other mouse-related tools like 'browser_drag' beyond the verb, which keeps 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.

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 scenarios where hovering is appropriate (e.g., to trigger dropdowns or tooltips) or when to avoid it (e.g., for direct interactions like clicking). With siblings like 'browser_click' and 'browser_drag' available, the lack of usage context leaves the agent to infer when this specific mouse action is needed.

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

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

Annotations indicate destructiveHint=true and readOnlyHint=false, which the description aligns with by implying installation (a write operation). The description adds valuable context beyond annotations by specifying it's for resolving installation errors, which helps the agent understand when this destructive action is appropriate.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Is the description appropriately sized, front-loaded, and free of redundancy?

The description is two concise sentences that directly address the tool's purpose and usage scenario. Every word serves a clear function, with no redundant or unnecessary information.

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

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

Given the tool has 0 parameters, no output schema, and annotations cover key behavioral aspects (destructive, not read-only), the description provides sufficient context by explaining what it does and when to use it. It could slightly improve by mentioning what 'config' refers to, but it's adequate for this simple tool.

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

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

The input schema has 0 parameters with 100% coverage, so no parameter documentation is needed. The description appropriately doesn't discuss parameters, maintaining focus on the tool's purpose and usage context.

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

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

The description clearly states the action ('Install') and target ('browser specified in the config'), making the purpose understandable. However, it doesn't explicitly differentiate from sibling tools like browser_click or browser_navigate, which perform different browser operations rather than installation.

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

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

The description provides explicit guidance on when to use this tool: 'Call this if you get an error about the browser not being installed.' This clearly defines the trigger condition and context for usage, with no misleading information.

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

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

Annotations indicate destructiveHint=true and readOnlyHint=false, which the description does not contradict. However, the description adds minimal behavioral context beyond annotations—it implies navigation but does not specify effects like page loading, error handling, or browser state changes. With annotations covering safety, a baseline 3 is appropriate as the description adds little extra value.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Is the description appropriately sized, front-loaded, and free of redundancy?

The description is a single, efficient sentence with no wasted words. It is appropriately sized for a simple tool and front-loaded with the core action, making it easy to understand quickly.

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

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

Given the tool's low complexity (one parameter) and rich annotations (destructiveHint, openWorldHint), the description is minimally adequate. However, with no output schema and the description lacking details on return values or navigation outcomes, it leaves gaps in understanding the full tool behavior.

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

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

The input schema has 100% description coverage, with the 'url' parameter fully documented. The description does not add any meaning beyond the schema, such as URL format requirements or navigation behavior details. Baseline 3 is correct when the schema handles all parameter documentation.

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

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

The description 'Navigate to a URL' clearly states the action (navigate) and target (URL), making the purpose understandable. However, it does not differentiate from sibling tools like 'browser_navigate_back' or 'browser_navigate_forward', which are related navigation actions, so it lacks sibling distinction.

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

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

The description provides no guidance on when to use this tool versus alternatives. It does not mention when to choose this over other navigation tools like 'browser_navigate_back' or 'browser_navigate_forward', nor does it specify any prerequisites or exclusions for usage.

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

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

Annotations provide readOnlyHint=false, openWorldHint=true, and destructiveHint=true, indicating this is a mutable, potentially destructive action with open-world behavior. The description adds value by specifying 'previous page,' which clarifies the scope of the action beyond what annotations convey. However, it doesn't detail side effects like history changes or potential page reloads, so it's not fully comprehensive but still adds useful context without contradicting annotations.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Is the description appropriately sized, front-loaded, and free of redundancy?

The description 'Go back to the previous page' is a single, efficient sentence that is front-loaded with the core action. It wastes no words and directly communicates the tool's function, making it highly concise and well-structured for quick understanding.

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

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

Given the tool's low complexity (0 parameters, no output schema) and rich annotations (covering safety and behavior), the description is mostly complete. It specifies the action and target, but could benefit from mentioning potential outcomes like navigation failure or history state. However, with annotations handling key behavioral aspects, the description is adequate for the context, though not exhaustive.

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

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

The input schema has 0 parameters with 100% coverage, so no parameters need documentation. The description doesn't add parameter details, which is appropriate here. A baseline of 4 is applied as per the rules for 0 parameters, since the description doesn't need to compensate for any schema gaps and aligns well with the empty schema.

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

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

The description 'Go back to the previous page' clearly states the action (go back) and the resource (previous page) with a specific verb. It distinguishes this tool from siblings like 'browser_navigate' (which goes to a new page) and 'browser_tabs' (which manages tabs), making the purpose unambiguous and well-differentiated.

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

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

The description implies usage context (when you want to return to a previous page in browser navigation), but does not explicitly state when NOT to use it or name alternatives. For example, it doesn't specify that this should be used instead of 'browser_navigate' for backward navigation or mention prerequisites like requiring a browser session with history. The context is clear but lacks explicit exclusions or named alternatives.

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

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

Annotations already provide key behavioral hints (readOnlyHint: true, destructiveHint: false, openWorldHint: true), indicating it's a safe read operation with potentially open-ended data. The description adds context about the temporal scope ('since loading the page'), which is useful but doesn't elaborate on aspects like data format, pagination, or rate limits. With annotations covering safety, this earns a baseline score for adding some value.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Is the description appropriately sized, front-loaded, and free of redundancy?

The description is a single, clear sentence with no wasted words, effectively front-loading the core purpose. It's appropriately sized for a tool with one optional parameter and good annotations, making it easy to parse quickly.

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

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

Given the tool's low complexity (1 parameter, 100% schema coverage, annotations present), the description is adequate but has gaps. It lacks output details (no output schema), usage context, and doesn't fully compensate for the absence of behavioral specifics like data format. With annotations providing safety info, it's minimally viable but not comprehensive.

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

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

Schema description coverage is 100%, with the parameter 'includeStatic' fully documented in the schema. The description doesn't add any parameter-specific information beyond what's in the schema, so it meets the baseline score where the schema handles the heavy lifting.

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

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 a specific verb ('Returns') and resource ('all network requests since loading the page'), making it easy to understand what the tool does. However, it doesn't explicitly differentiate from sibling tools like browser_console_messages or browser_snapshot, which might also provide browser activity data, so it doesn't reach the highest score.

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

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 any prerequisites, context for usage, or comparisons to sibling tools like browser_console_messages, leaving the agent to infer usage based on the purpose alone.

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

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

Annotations provide key behavioral hints (destructiveHint: true, readOnlyHint: false, openWorldHint: true), but the description adds minimal context beyond stating the action. It doesn't elaborate on what 'destructive' means in this context (e.g., potential side effects like triggering events) or mention rate limits, though annotations cover the safety profile adequately.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Is the description appropriately sized, front-loaded, and free of redundancy?

The description is a single, clear sentence with zero wasted words. It's front-loaded with the core action, making it highly efficient and easy to parse, which is ideal for a simple tool.

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

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

Given the tool's low complexity (1 parameter, no output schema) and rich annotations, the description is minimally adequate. However, it lacks details on return values or error conditions, which could be helpful despite the annotations covering basic behavior.

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

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

With 100% schema description coverage, the input schema fully documents the single 'key' parameter, including examples like 'ArrowLeft' or 'a'. The description adds no additional parameter information, so it meets the baseline for high schema coverage without compensating value.

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

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

The description 'Press a key on the keyboard' clearly states the action (press) and resource (key on keyboard), making the purpose immediately understandable. However, it doesn't differentiate from sibling tools like 'browser_type' which might have overlapping functionality, preventing 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.

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 'browser_type' or 'browser_click'. It lacks context about specific scenarios, prerequisites, or exclusions, leaving the agent to infer usage from the tool name alone.

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

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

Annotations indicate destructiveHint=true and readOnlyHint=false, which the description aligns with by implying a mutation (resizing). The description adds context beyond annotations by specifying it affects the 'browser window' (not just a tab or element), but doesn't detail side effects (e.g., might trigger page reloads, affect viewport-dependent content). No contradiction with annotations, and it provides some useful 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.

Is the description appropriately sized, front-loaded, and free of redundancy?

The description is a single, front-loaded sentence ('Resize the browser window') that directly conveys the core function without any wasted words. It's appropriately sized for a simple tool and earns its place by clearly stating the action and target.

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

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

Given the tool's moderate complexity (a destructive operation with two parameters), the description is minimally adequate. Annotations cover safety (destructive) and mutability, and the schema fully documents parameters. However, with no output schema, the description doesn't explain return values (e.g., success confirmation, error handling), and it lacks context about integration with sibling tools. It meets basic needs but has clear gaps.

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

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

The input schema has 100% description coverage, with clear documentation for width and height parameters. The description doesn't add any meaning beyond the schema (e.g., units, valid ranges, or default behaviors). According to the rules, with high schema coverage, the baseline is 3, which is appropriate here as the schema carries the full burden of parameter documentation.

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

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

The description 'Resize the browser window' clearly states the action (resize) and resource (browser window), making the purpose immediately understandable. It distinguishes from siblings like browser_close or browser_navigate by specifying the resize operation. However, it doesn't explicitly differentiate from all siblings (e.g., browser_snapshot might also involve window dimensions), so it falls short of a perfect 5.

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

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 (e.g., requires an active browser session), exclusions (e.g., not for mobile browsers), or context (e.g., use before taking screenshots for consistent sizing). With siblings like browser_take_screenshot that might benefit from resizing, this lack of guidance is a significant gap.

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

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

Annotations indicate readOnlyHint=false, openWorldHint=true, and destructiveHint=true, covering safety and scope. The description adds value by specifying that the code runs Playwright snippets, implying browser automation with potential side effects, which aligns with annotations. However, it doesn't detail execution limits, error handling, or resource implications beyond the annotations.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Is the description appropriately sized, front-loaded, and free of redundancy?

The description is a single, efficient phrase 'Run Playwright code snippet' that is front-loaded and wastes no words. It directly conveys the core purpose without unnecessary elaboration, 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.

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

Given the tool's complexity (executing arbitrary code with destructive potential), annotations provide safety hints, and the schema fully describes the parameter. However, with no output schema and minimal description, it lacks details on return values, error cases, or execution context, leaving gaps for an agent to handle this powerful tool effectively.

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

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

Schema description coverage is 100%, with the schema fully documenting the 'code' parameter as a JavaScript function for Playwright execution. The description adds no additional parameter semantics beyond what the schema provides, so it meets the baseline for high coverage without extra value.

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

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

The description 'Run Playwright code snippet' clearly states the action (run) and resource (Playwright code snippet), distinguishing it from siblings like browser_click or browser_navigate that perform specific actions. However, it doesn't explicitly differentiate from browser_evaluate, which might also execute code, making it slightly less specific.

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

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

No guidance is provided on when to use this tool versus alternatives like browser_evaluate or other specific interaction tools. The description lacks context about use cases, prerequisites, or exclusions, leaving the agent to infer usage 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.

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

Annotations indicate destructiveHint=true and readOnlyHint=false, which the description doesn't contradict. However, the description adds no behavioral context beyond the annotations—it doesn't explain what 'destructive' means here (e.g., changes UI state), rate limits, or error handling. With annotations covering safety, a 3 reflects minimal added value.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Is the description appropriately sized, front-loaded, and free of redundancy?

The description is a single, efficient sentence with zero waste—it directly states the tool's purpose without redundancy. It's appropriately sized for a simple action tool and front-loaded with essential information.

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

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

Given the tool's complexity (moderate, with destructive behavior), rich annotations, and no output schema, the description is minimally adequate. It covers the basic action but lacks details on outcomes, error cases, or integration with siblings like browser_snapshot for obtaining 'ref'. With annotations, it meets a baseline but could be more informative.

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

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

Schema description coverage is 100%, so parameters are fully documented in the schema. The description adds no additional meaning beyond implying dropdown interaction, which is already clear from the tool name. 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.

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

The description 'Select an option in a dropdown' clearly states the action (select) and target (dropdown), distinguishing it from siblings like browser_click or browser_type. However, it doesn't explicitly differentiate from browser_handle_dialog which might also involve dropdowns, making it slightly less specific than a perfect 5.

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

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 (e.g., requiring a page snapshot), exclusions, or comparisons to siblings like browser_click for non-dropdown interactions, leaving the agent to infer usage from context alone.

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

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

Annotations indicate readOnlyHint=true, destructiveHint=false, and openWorldHint=true, which the description doesn't contradict. The description adds valuable context beyond annotations by specifying it captures an 'accessibility snapshot' (implying structured data like ARIA roles or text content) and notes it can save to a markdown file via the filename parameter. However, it doesn't detail behavioral aspects like rate limits, authentication needs, or exact output format, keeping the score from being a 5.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Is the description appropriately sized, front-loaded, and free of redundancy?

The description is a single, efficient sentence that front-loads the core purpose ('Capture accessibility snapshot of the current page') and adds a comparative note ('this is better than screenshot'). There is no wasted text, and it effectively communicates key information in a compact form, 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.

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

Given the tool's moderate complexity (1 parameter, no output schema), the description is reasonably complete. It clarifies the tool's purpose and distinguishes it from a sibling, with annotations covering safety and scope. However, it could be more complete by explaining what an 'accessibility snapshot' includes (e.g., HTML structure, ARIA attributes) or when to prefer it over other tools, slightly reducing the score.

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

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

The input schema has 1 parameter with 100% description coverage, documenting that 'filename' saves the snapshot to a markdown file instead of returning it in the response. The description adds no additional parameter semantics beyond this, as it doesn't explain the filename usage or format further. With high schema coverage, the baseline is 3, and the description doesn't compensate with extra details.

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

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

The description clearly states the tool captures an accessibility snapshot of the current page, specifying both the action (capture) and resource (accessibility snapshot of current page). It distinguishes from the sibling 'browser_take_screenshot' by noting this is 'better than screenshot,' though it doesn't fully explain how it differs functionally. The purpose is specific but could be more explicit about what an 'accessibility snapshot' entails compared to a regular screenshot.

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

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

The description implies usage by stating this is 'better than screenshot,' suggesting it as an alternative to 'browser_take_screenshot' for accessibility-focused captures. However, it lacks explicit guidance on when to use this tool versus others (e.g., for accessibility testing vs. visual documentation) or any prerequisites. The context is implied but not clearly defined, leaving some ambiguity for the agent.

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

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

Annotations provide readOnlyHint=false, destructiveHint=true, and openWorldHint=true, indicating mutable and potentially destructive operations. The description adds value by specifying actions (list, create, close, select), which clarifies behavioral scope beyond annotations, though it doesn't detail side effects like what happens on close or creation defaults.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Is the description appropriately sized, front-loaded, and free of redundancy?

The description is extremely concise and front-loaded, listing all key actions in a single, efficient sentence with zero wasted words. It directly communicates the tool's capabilities without redundancy or fluff.

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

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

Given the tool's moderate complexity (multiple actions, destructive potential) and lack of output schema, the description is minimally adequate. It covers what the tool does but lacks details on return values, error conditions, or interaction with browser state, leaving gaps for an AI agent to infer behavior.

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

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

Schema description coverage is 100%, with clear parameter descriptions (e.g., 'Operation to perform' for action, details on index usage). The description adds no additional parameter semantics beyond the schema, but the schema is comprehensive, so a baseline score of 3 is appropriate as it doesn't compensate unnecessarily.

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

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 (list, create, close, select) and resource (browser tab), making it easy to understand what the tool does. However, it doesn't explicitly differentiate from sibling tools like browser_close or browser_navigate, which could handle similar operations.

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

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 siblings like browser_close (for closing) and browser_navigate (for creating/selecting via navigation), there's no indication of context, prerequisites, or trade-offs for choosing this multi-action tool over specialized ones.

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

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

Annotations already declare readOnlyHint=true, destructiveHint=false, and openWorldHint=true, covering the safety profile. The description adds useful context about the inability to perform actions with the screenshot, which isn't captured in annotations. However, it doesn't describe behavioral aspects like what happens with permissions for element screenshots or how the tool handles errors.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Is the description appropriately sized, front-loaded, and free of redundancy?

Two sentences with zero waste. The first sentence states the core purpose, the second provides crucial usage guidance. Every word earns its place, and the structure is front-loaded with the most important information.

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

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

For a read-only tool with good annotations and full schema coverage, the description provides adequate context. It covers purpose and sibling differentiation well. The main gap is the lack of output information (no output schema and description doesn't mention what's returned), but given the tool's relative simplicity, this is a minor omission.

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

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 5 parameters thoroughly. The description doesn't add any parameter-specific information beyond what's in the schema, but the schema provides complete coverage, justifying the baseline score.

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

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

The description clearly states the specific action ('Take a screenshot') and resource ('current page'), distinguishing it from sibling tools like browser_snapshot which is mentioned for actions. It provides a complete verb+resource+scope statement.

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

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

Explicitly provides when-not-to-use guidance by stating 'You can't perform actions based on the screenshot, use browser_snapshot for actions.' This clearly distinguishes this tool from its sibling and provides clear alternative usage context.

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

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

Annotations indicate readOnlyHint=false, openWorldHint=true, and destructiveHint=true, covering safety and scope. The description adds context by specifying it types into 'editable element,' which clarifies the target beyond annotations. It doesn't contradict annotations, but lacks details on side effects (e.g., triggering events) or error handling, though annotations provide a good baseline.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Is the description appropriately sized, front-loaded, and free of redundancy?

The description is a single, front-loaded sentence ('Type text into editable element') with zero waste. It efficiently conveys the core purpose without unnecessary elaboration, making it highly concise and well-structured for quick understanding.

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

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

Given the tool's complexity (interactive browser action with 5 parameters), annotations provide good behavioral context (destructive, open-world), and schema coverage is 100%. However, no output schema exists, and the description lacks details on return values or error cases. It's adequate but has gaps in completeness for a mutation tool.

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

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

Schema description coverage is 100%, with clear parameter descriptions in the schema (e.g., 'element' for permission, 'ref' for target, 'slowly' for character-by-character typing). The description doesn't add meaning beyond the schema, but the schema is comprehensive, so a baseline score of 3 is appropriate as it doesn't compensate or detract.

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

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

The description 'Type text into editable element' clearly states the action (type) and target (editable element), distinguishing it from siblings like browser_click or browser_press_key. However, it doesn't explicitly differentiate from browser_select_option or browser_file_upload, which also involve input actions, making it clear but not fully sibling-differentiated.

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

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 (e.g., needing a page snapshot from browser_snapshot), exclusions (e.g., non-editable elements), or comparisons to siblings like browser_press_key for key presses or browser_select_option for dropdowns.

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

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

Annotations already indicate readOnlyHint=true, destructiveHint=false, and openWorldHint=true, covering safety and scope. The description adds minimal behavioral context by specifying what triggers the wait (text appearance/disappearance or time), but doesn't elaborate on timeout behavior, error handling, or interaction with other browser tools. No contradiction with annotations exists.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Is the description appropriately sized, front-loaded, and free of redundancy?

The description is a single, efficient sentence that front-loads the core functionality. It avoids redundancy and waste, though it could be slightly more structured by separating the text and time conditions for clarity.

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

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

Given the tool's moderate complexity (waiting with multiple triggers), annotations cover safety and scope, and schema fully documents parameters. However, without an output schema, the description doesn't explain return values (e.g., success/failure, timeout errors), leaving gaps in understanding the tool's full behavior in practice.

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

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

Schema description coverage is 100%, fully documenting all three parameters (text, textGone, time). The description mentions these parameters generically ('text to appear or disappear' and 'specified time') but adds no extra semantic details like format examples, mutual exclusivity, or default behaviors, so it meets the baseline without enhancing understanding.

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

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 waiting for text to appear/disappear or for time to pass, which is a specific verb+action combination. However, it doesn't explicitly distinguish this from sibling tools like browser_handle_dialog or browser_console_messages that might also involve waiting for specific conditions, though the core functionality is well-defined.

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

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 scenarios where waiting is preferred over other actions (e.g., using browser_handle_dialog for pop-ups) or prerequisites like needing an active browser session, leaving usage context entirely implicit.

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

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 describes the action ('perform a local system health check') and return value ('returns system information and configuration status'), but doesn't specify potential side effects, error conditions, performance characteristics, or authentication requirements. The description provides basic behavioral context but lacks depth for a diagnostic tool.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

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 sentence states the action and purpose, while the second explains the return value. There's zero wasted language, and the information is front-loaded with the most important details first.

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

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

Given no annotations and no output schema, the description provides basic context about what the tool does and what it returns. However, for a health check tool that presumably returns structured diagnostic information, the description could be more complete by specifying what 'system information and configuration status' includes or providing examples of typical output.

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

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

The schema has 100% description coverage for its single optional parameter, so the baseline is 3. The description doesn't add parameter-specific information beyond what's in the schema, but since there's only one optional parameter and the tool's primary function doesn't depend on it, this represents minimal parameter burden. The description focuses appropriately on the core functionality.

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

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 ('perform', 'verify') and resources ('local system health check', 'Playwright MCP server configuration and connectivity'). It distinguishes itself from sibling tools by focusing on system diagnostics rather than browser interactions like clicking, navigating, or taking screenshots.

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

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

The description implies usage context ('to verify Playwright MCP server configuration and connectivity') but doesn't explicitly state when to use this tool versus alternatives. No guidance is provided on prerequisites, timing, or exclusions, leaving the agent to infer appropriate usage scenarios.

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