Server Quality Checklist

Tool Scores

• app_get_generationB
  3.1/5.0
  Behavior2/5

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

  Annotations already declare readOnlyHint, openWorldHint, and idempotentHint, covering safety and idempotency. The description adds minimal behavioral context beyond 'status poll' and internal usage, adding little value 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.

  Conciseness5/5

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

  The description consists of two short sentences that front-load the core purpose and immediately follow with guidance on alternatives. Every word is purposeful, with no redundancy or filler.

  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 absence of an output schema and zero parameter coverage, the description fails to provide necessary invocation details. While annotations cover behavioral aspects, the lack of parameter semantics leaves the tool incomplete for agent use without external context.

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

  Parameters1/5

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

  Schema coverage is 0% and the description provides no information about the parameters 'request_id' and 'include_preview'. The agent receives no guidance on their meaning, format, or purpose, making correct invocation challenging.

  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 is an internal status poll for the Clipia generation viewer card, with a specific verb 'poll' and resource 'generation status'. It distinguishes from sibling get_generation by directing users to prefer the alternative.

  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 marks the tool as 'Internal' and advises to 'Prefer get_generation', providing clear guidance on when not to use and pointing to the alternative. However, it does not elaborate on specific scenarios for use.

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

• get_modelA
  4.1/5.0
  Behavior4/5

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

  Annotations already declare readOnlyHint, openWorldHint, and idempotentHint. The description adds specific behavioral context about what is returned (input_schema and price), going beyond the structured data.

  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, front-loaded sentence with no waste. Every word serves a purpose.

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

  Completeness5/5

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

  Given the simple tool (1 param, no output schema), the description adequately explains what is returned and the context. Annotations cover safety, making the description complete for this tool.

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

  Parameters3/5

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

  Schema coverage is 100%, so the schema fully documents the 'model' parameter. The description does not add additional meaning to the parameter beyond what is in the schema. Baseline 3 is appropriate.

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

  Purpose5/5

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

  The description clearly states 'Get model details' with specific outputs: input_schema and base price. This distinguishes it from siblings like list_models (which lists all models) and get_generation (which retrieves a generation).

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

  Usage Guidelines3/5

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

  No explicit guidance on when to use this tool over alternatives. The sibling tools are listed but not referenced. Usage is implied by the type of data returned but lacks exclusions or comparisons.

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

• chatA
  4.2/5.0
  Behavior4/5

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

  Annotated with readOnlyHint=false, openWorldHint=true, idempotentHint=false. The description adds the key behavioral detail: 'Charged in credits from the connected account', which is not in annotations. No contradiction with 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?

  Two sentences: first states the core function and output, second explains input modes and cost. Every sentence is functional, no redundancy, front-loaded.

  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?

  Although no output schema exists, the description mentions output content (reply text, token usage, credit cost), which is sufficient for a straightforward chat tool. Parameters are fully covered in schema and augmented by description.

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

  Parameters4/5

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

  Schema description coverage is 100%, establishing a baseline of 3. The description adds value by advising when to use 'model' parameter and clarifying the choice between 'prompt' and 'messages'.

  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 specifies 'Chat with a text LLM (Claude / GPT / Gemini / DeepSeek class)' and the output includes 'reply text plus token usage and credit cost'. It clearly distinguishes from sibling tools like image or audio generation.

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

  Usage Guidelines3/5

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

  The description provides guidance on using a single prompt vs messages array and model selection hints (e.g., 'Pass a flagship reasoning model for hard tasks'), but lacks explicit when-not-to-use guidance or direct comparison to sibling tools like 'get_generation'.

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

• generate_imageA
  4.2/5.0
  Behavior4/5

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

  The description adds behavioral details beyond annotations: it waits for completion, returns inline URL and preview, and mentions cost in credits. No contradiction with annotations (readOnlyHint false, destructiveHint false).

  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?

  Three sentences, concise and front-loaded with key information, no wasteful 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?

  Given 12 parameters and no output schema, the description adequately covers core behavior (inline result, cost), though more detail on idempotency or batch behavior could be included.

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

  Parameters3/5

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

  Schema coverage is 92%, so the description adds limited new semantics. The description clarifies 'image_urls' for editing/image-to-image, but most parameters are well-documented in the schema.

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

  Purpose5/5

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

  The description explicitly states it generates images from text prompts with optional reference images for editing, clearly distinguishing it from sibling tools like generate_video or generate_audio.

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

  Usage Guidelines4/5

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

  The description mentions optional reference images for editing/image-to-image, providing context on when to use this tool, but does not explicitly state when not to use or name alternatives.

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

• generate_scenarioA
  4.2/5.0
  Behavior4/5

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

  Annotations indicate non-read-only, non-idempotent, and openWorldHint=true. The description adds that it is 'Charged in credits like chat (LLM usage),' providing cost transparency. It does not contradict annotations. It could detail output structure more, but the behavioral traits are adequately disclosed.

  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 very concise: two sentences, front-loaded with purpose and output, followed by workflow and cost. Every sentence is necessary and no extraneous information.

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

  Completeness4/5

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

  Given the complexity of a planning tool with no output schema, the description effectively communicates the output (structured scenario) and the integration with sibling tools. It also covers cost. However, it could be more complete by specifying the exact output format or providing an example, but it is sufficient for understanding.

  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 83% coverage with parameter descriptions. The description does not add significant new meaning beyond what the schema provides; it only implicitly references the 'prompt' parameter. With high schema coverage, baseline is 3.

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

  Purpose5/5

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

  The description clearly states the tool's purpose: 'Plan a multi-scene video from a brief.' It details the output (per-scene prompts, durations, soundtrack prompt) and distinguishes itself from sibling tools like generate_video and compose_video by specifying the workflow.

  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 tells when to use the tool (planning from a brief) and provides the subsequent steps: feed scenes to generate_video and stitch with compose_video. It also mentions cost context. However, it does not explicitly state when not to use or list alternatives, though sibling tools are available.

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

• search_templatesA
  4.2/5.0
  Behavior4/5

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

  Annotations already provide readOnlyHint, openWorldHint, and idempotentHint. The description adds valuable behavioral details: hybrid search type, language support, and that results are ready-to-use prompts with a recommended model. No contradiction with 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?

  Two sentences efficiently convey scope, search method, languages, output content, and usage direction. All information is front-loaded, with no redundant or unnecessary words.

  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?

  The description lacks details on pagination and exact return format, but given the simple parameter set and absence of output schema, the description covers key aspects: what is searched, results contain prompt and model, and next steps. It is sufficiently complete for 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 coverage is only 33% (media_type described). The description does not explain query or limit parameters beyond the schema. However, the description's context of search type and output purpose partially compensates for missing parameter details, so it's adequate.

  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 searches prompt templates with specifics: 3500+ curated, hybrid text+semantic search, supports Russian/English query. It distinguishes from sibling generation tools by positioning it as a precursor to generate_image/generate_video.

  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 tells when to use (to find prompt templates) and directs the output to generation tools, providing clear context. It does not include exclusions or alternatives, but there are no sibling search tools, so differentiation is implicit.

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

• wait_generationA
  4.2/5.0
  Behavior4/5

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

  Annotations already provide readOnlyHint, idempotentHint, openWorldHint. The description adds behavioral details: long-poll mechanism, statuses to poll for, and return content (output URLs, inline preview). This goes beyond annotations without contradiction.

  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 two sentences, front-loaded with the key purpose, and every sentence provides necessary information without redundancy.

  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 polling tool with 3 parameters and no output schema, the description covers the core flow and expected results. It lacks explicit mention of intermediate status fields or error handling, but overall it is reasonably 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?

  With 0% schema description coverage, the description must explain parameters. It mentions wait_seconds and implicitly include_preview via 'inline image preview', but request_id is not explained. It lacks explicit details on defaults and constraints, so it is adequate but not thorough.

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

  Purpose5/5

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

  The description clearly states it waits for a generation to finish using long-polling, and explicitly says to call repeatedly until COMPLETED, FAILED, or CANCELED. This distinguishes it from siblings like get_generation which likely just returns current status without blocking.

  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 provides clear usage guidance: call repeatedly until termination statuses. It implies when to use this tool (blocking wait) vs alternatives (simple status check), but does not explicitly exclude other use cases.

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

• get_balanceA
  4.3/5.0
  Behavior4/5

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

  Annotations already declare readOnlyHint and idempotentHint, and the description adds value by specifying exactly what data is returned (balance and usage).

  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?

  Single sentence, concise and front-loaded with key information without excess.

  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?

  Tool is simple with no params and good annotations; the description adequately covers the return value context.

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

  Parameters4/5

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

  No parameters, so baseline 4; description adds no param info but none needed.

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

  Purpose5/5

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

  The description clearly states it retrieves the credit balance and 30-day usage, which is specific and distinct from sibling tools like get_generation or get_model.

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

  Usage Guidelines3/5

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

  No explicit guidance on when to use this tool versus alternatives; usage is implied but lacks exclusions or context.

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

• get_generationA
  4.3/5.0
  Behavior5/5

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

  Adds value beyond annotations by detailing output structure when completed, including inline preview and original URL. No contradiction with readOnlyHint, idempotentHint.

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

  Conciseness5/5

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

  Two sentences, no wasted words. First sentence captures core purpose, second adds crucial output detail.

  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?

  Adequate for a simple polling tool, covering main output. However, lacks description of behavior when generation is still pending (e.g., status without output).

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

  Parameters2/5

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

  Schema description coverage is 0%, but the description fails to explain the two parameters (request_id, include_preview), leaving the agent to infer their meaning from names alone.

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

  Purpose5/5

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

  The description clearly states the verb 'Get' and resource 'current status/result of a generation', distinguishing it from waiting alternatives like wait_generation.

  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?

  Explicitly mentions 'without waiting', indicating polling use case. Sibling tool wait_generation provides contrast, though no explicit when-not-to-use.

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

• list_modelsA
  4.3/5.0
  Behavior4/5

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

  Annotations already declare readOnlyHint=true and idempotentHint=true, so the description doesn't need to restate safety. It adds value by detailing the output content (type, capabilities, price), aiding the agent in understanding what to expect.

  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 two sentences, front-loaded with purpose and then usage. Every sentence adds value without redundancy, making it highly concise.

  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?

  For a simple read-only list tool with no output schema, the description covers all needed aspects: what it lists, why to use it, and the available filter (type). No critical information is missing.

  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 67% schema description coverage, the schema already documents the three parameters adequately. The description adds no additional meaning beyond what is in the schema, so a baseline of 3 is appropriate.

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

  Purpose5/5

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

  The description clearly states the verb 'list' and the resource 'available AI models', specifying the attributes provided (type, capabilities, price). It distinguishes from sibling 'get_model' by indicating it lists multiple models for comparison.

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

  Usage Guidelines4/5

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

  The description explicitly advises when to use: 'before generating if the user asks for a specific model or to compare options.' While it doesn't specify when not to use, for a simple list tool this is sufficient guidance.

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

• generate_presentationA
  4.5/5.0
  Behavior5/5

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

  The description adds significant behavioral context beyond the annotations: it explains the asynchronous nature (returns request_id, poll with wait_generation), cost implications (credits), and output structure (pptx_url, pdf_url, preview_urls). No contradictions with annotations.

  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 the core purpose. It efficiently covers all major aspects in a single paragraph, though a more structured format (e.g., bullet points) could improve readability.

  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 complex tool with async behavior and credit costs, the description covers creation steps, polling, output formats, and cost. It lacks error handling or edge case details, but overall is thorough.

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

  Parameters4/5

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

  Schema coverage is 100%, providing baseline. The description adds value by explaining how parameters interact (e.g., 'For illustrations set image.prompt (English)', 'skip images for text-only slides', and layout descriptions) beyond the raw schema.

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

  Purpose5/5

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

  The description clearly states the tool's function: 'Generate a slide presentation (editable PPTX + PDF + PNG previews) from a DeckSpec you compose.' It specifies the outputs and differentiates from sibling tools like generate_image or compose_video.

  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 provides explicit guidance on how to construct the DeckSpec, including required fields, layout options, image handling, and cost. It does not explicitly mention when to use this tool versus alternatives, but the context is clear.

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

• generate_videoA
  4.5/5.0
  Behavior5/5

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

  Description adds significant behavioral details beyond annotations: de-duplication within ~20s, one clip per call, need for separate calls with different seeds for variants, and approximate render time (1-10 min). Annotations only indicate non-readonly and non-destructive; description fills the gaps.

  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?

  Description is concise (one paragraph) and front-loaded with the core purpose. However, it could be slightly more structured (e.g., bullet points for two modes). No wasted words.

  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 11 parameters, all documented in schema, and no output schema, the description covers return format (request_id, cost) and polling mechanism. It does not explicitly mention all sibling tools but the context is sufficient for an AI agent.

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

  Parameters4/5

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

  Schema already covers all 11 parameters with descriptions (100% coverage). The description adds value by explaining de-duplication behavior and idempotency_key usage, which is not fully captured in 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?

  Clearly states the tool starts video generation from text or image, with immediate return of request_id and cost, and distinguishes between text-to-video and image-to-video modes. It differentiates from siblings like generate_image and compose_video.

  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 explicit guidance on when to use text-to-video versus image-to-video (by passing image_url). Mentions polling with wait_generation as a follow-up. Does not explicitly list when not to use but implies through context.

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

• compose_videoA
  4.6/5.0
  Behavior5/5

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

  The description adds extensive behavioral details beyond annotations: scenes are normalized, optional soundtrack replaces scene audio, voiceover ducks audio, and return value is a request_id to poll. No contradiction with annotations (readOnlyHint=false, destructiveHint=false).

  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 paragraph that is dense but well-structured, front-loading the main action and then detailing parameters. It could be slightly more scannable with bullet points, but it is still concise for the complexity (9 parameters).

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

  Completeness4/5

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

  Given the absence of an output schema, the description explains the return value and polling workflow. It covers typical use cases and most parameters. It doesn't cover error handling or edge cases, but for a tool with openWorldHint=true, it is reasonably complete.

  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?

  With 89% schema coverage, the description still adds significant meaning: clarifies that scenes items can be request_id or video_url, duration_seconds trims/extend, normalize purpose, distinction between URL and request_id for audio/voiceover, and subtitles are burned-in. The schema already describes many parameters, but the description enriches understanding.

  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 ('Stitch 2–20 finished video scenes into ONE final clip server-side'), the resource (video scenes), and the outcome. It distinguishes from siblings like generate_video (produces individual scenes) and wait_generation (polling). The typical flow is also mentioned.

  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 explains when to use (after completing video generations, pass request_ids or media URLs) and provides a typical workflow. It lacks an explicit when-not, but the context is sufficient for an AI to understand the tool's place in the pipeline.

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

• generate_audioA
  4.8/5.0
  Behavior5/5

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

  Discloses asynchronous behavior (immediate request_id, polling needed), cost return, and safe retry via idempotency_key. No contradictions with annotations (readOnlyHint=false, idempotentHint=false).

  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?

  Single paragraph, efficiently structured: main action first, then return/polling details, then integration use case. No wasted words.

  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 workflow end-to-end: generation, polling, output retrieval, and integration with compose_video. Handles the async nature and optional parameters adequately without needing an output schema.

  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?

  Adds meaningful context beyond schema, e.g., character limits for text, language support (Russian/English), and usage of stability parameter. Schema coverage is 100%, so description complements well.

  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 'Generate speech from text (text-to-speech)' and specifies the resource (audio), action (generate), and output format (mp3). It distinguishes from sibling tools like generate_music by mentioning integration with compose_video.

  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 explicit guidance on polling with wait_generation and using the result for compose_video. Includes advice on splitting long texts. Does not explicitly mention when not to use, but is clear enough given sibling context.

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

• generate_musicA
  4.8/5.0
  Behavior5/5

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

  With annotations already indicating a write operation, description adds crucial async behavior: returns request_id immediately, polling needed, generation time 1-3 min, and output URL. Also mentions cost in credits, and describes destructiveHint via idempotency key.

  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?

  Efficient and well-structured: purpose first, then async behavior, then usage integration, then parameter tips. No redundant sentences, all information earns its place.

  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?

  Despite no output schema, description fully explains the return (request_id, cost) and how to retrieve final audio. Covers lifecycle, companion tools, parameter usage, and constraints. Complete for 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?

  100% schema coverage, but description adds valuable context: prompt tips (mood/genre/tempo/instruments, English best), instrumental default explanation, wait_seconds behavior, and idempotency_key for safe retries. Goes beyond schema to improve usability.

  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?

  Clearly states it generates background music/soundtrack from text description, distinguishes from siblings by specifying instrumental default and use as soundtrack under narration. Also explains the output and integration with other 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 context: ideal for background music, instrumental, can be used with compose_video or standalone, and recommends polling. Does not explicitly contrast with generate_audio for speech/sound effects, but the musical focus is evident.

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