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oassis — web scraping, crawling and browser control for AI agents

by dev.oassis
OverviewDiscussionsAdmin

web_crawl_status

Idempotent

Checks a crawl: status, pages read, discovered and still queued, and the pages themselves. Free for the owning account. Pass cancel: true to stop it.

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": {
      "jobId": "<jobId>"
    },
    "name": "web_crawl_status"
  }
}

Input Schema

NameRequiredDescriptionDefault
jobIdYesThe crawl, from web_crawl.
limitNoPages to return (default 50).
cancelNoStop pending pages and refund pages that never started. An in-flight read may finish and is billed; failed reads are refunded.

Schema Changelog

Changes observed during successful MCP inspections.

  1. Changed1 schema field changed
    • changedInput schema / properties / cancel / description
      Previous value: -"Stop the crawl and refund what it did not read."New value: +"Stop pending pages and refund pages that never started. An in-flight read may finish and is billed; failed reads are refunded."
  2. Changed1 schema field changed
    • addedInput schema / properties / jobId / description
      Added value: +"The crawl, from web_crawl."
  3. First observed

TDQS

A3.7/5.0
Behavior4/5

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

Annotations cover the safety profile (readOnlyHint=false due to cancel, destructiveHint=false, idempotentHint=true), and the description adds non-annotated context: 'Free for the owning account' and the fact that cancel stops the crawl. It omits the refund/in-flight nuance, but that detail lives in the schema's cancel description, so the bar is met.

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?

Two short sentences, front-loaded with the return contents, then the cost note, then the cancel trigger. Efficient and readable, with only minor overlap between 'Pass cancel: true' and the schema's cancel description.

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?

With no output schema, the description usefully enumerates what a caller receives (status, pages read, discovered, queued, pages themselves), and annotations plus the schema cover safety and parameters. Pagination defaults and polling cadence are left unstated, which is a minor gap.

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 jobId, limit, and cancel are already fully documented, including the refund semantics for cancel. The description only restates the cancel usage, adding no meaning beyond the schema. Baseline 3 applies.

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?

States a specific verb and resource ('Checks a crawl') and enumerates the returned fields, so an agent can distinguish it from the initiating sibling web_crawl. It stops short of naming web_crawl as the counterpart, leaving sibling differentiation partly to inference.

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

Usage Guidelines3/5

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

The description implies usage (poll a crawl started elsewhere) and gives one explicit action ('Pass cancel: true to stop it'), but never states when to use this versus web_batch_status, web_task_status, or when not to call it. Usage is implied rather than prescribed.

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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