PageDigest — Web Page Summarizer & Structured Extractor

Web Page Summarizer & Structured Extractor

summarize_url

Fetch a web page URL and return a concise summary, key points, page title/description, headings, and structured entities (named phrases, dates, amounts, links). Pay-per-call via x402 on X Layer. Input: a public http(s) URL.

Tool call template

Replace each placeholder with a value matching the input schema. Only required parameters are included; add optional parameters as needed.

{
  "id": 1,
  "jsonrpc": "2.0",
  "method": "tools/call",
  "params": {
    "arguments": {
      "url": "<url>"
    },
    "name": "summarize_url"
  }
}

Input Schema

Name	Required	Description	Default
`url`	Yes	Public http(s) URL of the page to summarize.
`maxSentences`	No	Maximum sentences in the summary (default 5).

Schema Changelog

Changes observed during successful MCP inspections.

First observedNov 10, 2026

TDQS

A3.6/5.0

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 usefully discloses the returned content and the pay-per-call x402/X Layer cost mechanism, but it does not cover error behavior, authentication, rate limits, or handling of inaccessible or dynamic pages.

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 two sentences, front-loads the primary action and outputs, and includes the payment model and input constraint without excess wording. The final 'Input:' sentence is slightly redundant with the schema but still improves scanability.

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

Completeness3/5

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

For a two-parameter read-only tool with no output schema, the description lists the main return fields and discloses the payment model. However, it does not specify the response format or explain failure modes, which limits completeness for an agent invoking it on arbitrary web pages.

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

Parameters3/5

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

Schema description coverage is 100%, so both parameters are already documented in the input schema. The description repeats the public http(s) URL requirement and does not add meaning for maxSentences, so the 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 states a specific verb and resource: fetch a web page URL and return a concise summary plus several enumerated extracted fields. It clearly distinguishes the operation from a generic fetch by naming the summary, key points, metadata, headings, and structured entities it produces.

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?

Usage is implied by the operation and the stated requirement for a public http(s) URL, but there is no explicit when-to-use guidance, no exclusions, and no alternatives to compare against. This is adequate for a single-purpose summarization tool but leaves the agent to infer applicability.

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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