Polygon x402 AI Data Agent
Server Quality Checklist
Latest release: v1.2.5
- Disambiguation5/5
Each tool targets a clearly distinct resource and action: the two get_* tools separate payment/pricing info from vault balance/session status, and the three clean_* tools are cleanly split by source type (web, YouTube, PDF). An agent would not likely confuse which tool to select for a given task.
Naming Consistency5/5All tool names follow a consistent verb_noun snake_case pattern. The clean_* tools share a uniform prefix with source-specific suffixes, and the get_* tools use the same straightforward verb-based convention.
Tool Count5/5Five tools is a compact, well-scoped set for an x402 data agent: three content-cleaning tools covering common data sources and two payment/session tools. There is no obvious redundancy or unnecessary bloat.
Completeness4/5The core data-cleaning and payment-information workflows are covered: pricing, balance, and three major content formats. The only notable gap is the lack of a tool to directly execute a payment or manage vault sessions, though this may be handled externally via x402 endpoints.
Average 3.4/5 across 5 of 5 tools scored. Lowest: 2.6/5.
See the Tool Scores section below for per-tool breakdowns.
- No community issues in the last 6 months
- 60 commits in the last 12 weeks
- No stable releases found
- No critical vulnerability alerts
- No high-severity vulnerability alerts
- No code scanning findings
- CI status not available
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How is the quality score calculated?
The overall quality score combines two components: Tool Definition Quality (70%) and Server Coherence (30%).
Tool Definition Quality measures how well each tool describes itself to AI agents. Every tool is scored 1–5 across six dimensions: Purpose Clarity (25%), Usage Guidelines (20%), Behavioral Transparency (20%), Parameter Semantics (15%), Conciseness & Structure (10%), and Contextual Completeness (10%). The server-level definition quality score is calculated as 60% mean TDQS + 40% minimum TDQS, so a single poorly described tool pulls the score down.
Server Coherence evaluates how well the tools work together as a set, scoring four dimensions equally: Disambiguation (can agents tell tools apart?), Naming Consistency, Tool Count Appropriateness, and Completeness (are there gaps in the tool surface?).
Tiers are derived from the overall score: A (≥3.5), B (≥3.0), C (≥2.0), D (≥1.0), F (<1.0). B and above is considered passing.
Tool Scores
- Behavior2/5
Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
No annotations are provided, so the description must fully disclose behavioral traits. It mentions 'AI-powered comprehensive summaries' and 'high-precision subtitles', but does not describe potential side effects (e.g., it may call external Gemini API, may require auth, may have rate limits/delays). The description doesn't state whether this is a read-only operation or what happens with the data. This lack of disclosure leaves the agent without essential 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.
Conciseness3/5Is the description appropriately sized, front-loaded, and free of redundancy?
The description is a single sentence, concise and front-loaded with the primary action. It avoids verbosity but doesn't offer any structural breakdown for multiple outputs (subtitles vs transcripts vs summaries) or parameter-specific details. It's efficient but minimal.
Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.
Completeness2/5Given 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 must carry substantial context. It lacks guidance on which output type to expect, how language selection works, or when the AI summary is appropriate. The tool handles several modes but the description doesn't explain how to choose among them or what the response looks like.
Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.
Parameters2/5Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?
The input schema covers all three parameters (url, lang, auth_token_or_tx) but with minimal descriptions. The description adds no meaning beyond what the schema provides — it doesn't explain the `lang` default format ('ko,en') or the purpose of `auth_token_or_tx`. Since schema coverage is 100%, baseline is 3, but the description fails to enrich or clarify parameter semantics for an agent.
Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.
Purpose4/5Does the description clearly state what the tool does and how it differs from similar tools?
The description specifies a clear verb ('Extracts') and a resource ('subtitles, transcripts, or AI-powered comprehensive summaries for any YouTube video'), which tells the agent what the tool operates on. It distinguishes itself from generic transcript tools by mentioning Gemini AI for high-precision output. However, the description doesn't explicitly contrast with sibling tools (none provided), so it doesn't fully separate from alternatives.
Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.
Usage Guidelines2/5Does the description explain when to use this tool, when not to, or what alternatives exist?
The description states the general action ('Extracts ... for any YouTube video') but provides no guidance on when to use this tool versus alternatives. There are no sibling tools listed, no mention of use cases, prerequisites, or scenarios where this tool would be preferred. Without this context, an agent must infer usage from the schema alone.
Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.
- Behavior2/5
Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
No annotations are provided, so the description carries the full burden of behavioral disclosure. It only restates the core parse/extract behavior and omits important traits such as how max_pages is applied, whether auth_token_or_tx is required for paywalled papers, or what happens with malformed or non-PDF URLs.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.
Conciseness4/5Is the description appropriately sized, front-loaded, and free of redundancy?
One compact sentence with no filler, and the key resource is front-loaded. Minor redundancy in 'Parses and extracts' and the lack of any parameter-level context keep it from being a perfect 5.
Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.
Completeness2/5Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?
The output schema exists, so return values need not be described, but the tool involves three parameters including an optional auth token and page limit. The description does not address when or why those are used, and with no annotations to fill the gap, an agent is left under-equipped for non-trivial calls.
Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.
Parameters2/5Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?
Schema description coverage is 0%, so the description must compensate. It adds no detail for max_pages or auth_token_or_tx, and only weakly clarifies url by implying it should point to online PDFs. The required parameter is inferable, but the optional parameters remain unexplained.
Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.
Purpose5/5Does the description clearly state what the tool does and how it differs from similar tools?
States a specific action ('Parses and extracts'), defines the input resource ('online PDF whitepapers and academic research papers'), and specifies the output ('structured plain text and metadata'). This clearly differentiates it from sibling tools like clean_web_content and clean_youtube_transcript, which target other media types.
Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.
Usage Guidelines3/5Does the description explain when to use this tool, when not to, or what alternatives exist?
The description implies the tool is for PDF-based research content but does not explicitly say when to prefer it over alternatives such as clean_web_content or clean_youtube_transcript, nor does it state any exclusions. An agent must infer usage from the resource type rather than being guided to the right choice.
Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.
- Behavior3/5
Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations provided, the description carries the burden of behavioral disclosure. 'Returns' implies a read operation, and the listed content categories give basic insight, but there is no explicit statement about side effects, permissions, or whether this is purely non-mutating. This is adequate but not deeply transparent.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.
Conciseness5/5Is the description appropriately sized, front-loaded, and free of redundancy?
The description is a single sentence that front-loads the operation ('Returns') and then lists the specific returned data categories. Every word contributes information, with no filler or redundant phrasing.
Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.
Completeness4/5Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?
For a zero-parameter, read-only information tool with an output schema present, the description is largely complete: it names the three key output categories. The only gap is the potential ambiguity between 'vault endpoints' and the sibling get_vault_balance, which could have been clarified.
Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.
Parameters4/5Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?
The tool has zero parameters and the input schema confirms an empty properties object with 100% schema description coverage. With no parameters to document, the baseline of 4 applies and the description need not add parameter detail.
Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.
Purpose4/5Does the description clearly state what the tool does and how it differs from similar tools?
The description uses a specific verb ('Returns') and names the resource categories: Web3 x402 micropayment pricing, multi-chain USDC details, and vault endpoints. It is clearly distinguishable from the clean_* siblings, though the mention of 'vault endpoints' creates some overlap with get_vault_balance.
Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.
Usage Guidelines2/5Does the description explain when to use this tool, when not to, or what alternatives exist?
The description gives no explicit guidance on when to use this tool versus alternatives. It does not mention get_vault_balance or other siblings, so an agent must infer selection entirely from the listed content categories.
Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.
- Behavior3/5
Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations, the description carries the full behavioral burden. It discloses that content is scraped, converted to markdown, and cleansed of ads/navbars/noise, which is useful. However, it does not mention authentication requirements, dynamic/JavaScript-rendered pages, rate limits, or failure behavior, especially given the unexplained auth_token_or_tx parameter.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.
Conciseness5/5Is the description appropriately sized, front-loaded, and free of redundancy?
The description is a single efficient sentence with no filler. The action and output format are front-loaded, and the noise-removal detail earns its place by clarifying what 'clean' means.
Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.
Completeness3/5Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?
An output schema exists, so return-value details do not need to be in the description. The main gap is the unexplained auth_token_or_tx parameter and the overbroad claim of 'any raw web page' when authenticated or dynamically rendered pages may behave differently. Still, for a straightforward public-page scraper, the description is mostly adequate.
Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.
Parameters2/5Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?
Schema description coverage is 0%, so the description must compensate, but it does not explain either parameter. The URL parameter can be inferred from the tool's purpose, but auth_token_or_tx is completely opaque—when it is needed, what format it should take, or what 'tx' means.
Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.
Purpose5/5Does the description clearly state what the tool does and how it differs from similar tools?
The description clearly states a specific action ('Scrapes and converts'), a target resource ('any raw web page'), and a concrete output ('clean, LLM-ready markdown'). It also differentiates from the sibling tools by specifying web pages rather than YouTube transcripts or PDFs.
Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.
Usage Guidelines3/5Does the description explain when to use this tool, when not to, or what alternatives exist?
The intended use case is implied: use this for raw web pages, while clean_youtube_transcript and clean_pdf_research serve other sources. However, there is no explicit statement about when not to use it, nor any direct comparison to alternatives.
Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.
- Behavior3/5
Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
No annotations are provided, so the description carries the behavioral disclosure burden. 'Checks' implies a non-mutating read, and naming balance and session status gives useful context. Still, it does not mention auth requirements, side effects, or what happens with invalid or expired addresses, so some transparency gaps remain.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.
Conciseness5/5Is the description appropriately sized, front-loaded, and free of redundancy?
A single, concise sentence with the action verb front-loaded and no unnecessary detail. Every word contributes meaning and the structure is immediately scannable.
Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.
Completeness4/5Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?
Given the tool has only one parameter, no annotations, and an output schema present, the description covers the essential context. It could additionally state when to prefer this tool or clarify session status behavior, but for a simple balance/status check the description is nearly complete.
Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.
Parameters4/5Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?
The schema has 0% description coverage for the single required parameter, so the description must compensate. It clarifies that 'agent_address_or_key' can be either an agent wallet address or a session key, adding meaning beyond the parameter name. It does not provide format examples, but for one straightforward parameter this is sufficient.
Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.
Purpose5/5Does the description clearly state what the tool does and how it differs from similar tools?
The description clearly states a specific verb ('Checks'), a specific resource ('remaining pre-funded USDC balance and session status'), and a target ('agent wallet address or session key'). It distinguishes the tool from sibling 'get_payment_info' by focusing on vault balance and session status rather than payment information.
Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.
Usage Guidelines3/5Does the description explain when to use this tool, when not to, or what alternatives exist?
The intended use is implied: it is for checking an agent's vault balance and session status. However, there is no explicit guidance about when to use this tool versus siblings, prerequisites, or conditions that would make it the right choice. For a simple read operation, this is adequate but not fully explicit.
Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.
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