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get_archived

Retrieve the closest Wayback Machine snapshot for a URL, optionally near a specified date.

Instructions

Get the closest Wayback snapshot for a URL near a given date (defaults to most recent).

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
urlYes
dateNoOptional ISO date (YYYY-MM-DD) or Wayback timestamp (YYYYMMDDHHMMSS)
Behavior3/5

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

No annotations provided, so description must carry full burden. It states behavior (closest snapshot, default to most recent) but does not disclose error handling, authorization needs, or side effects. Adequate for a read operation but lacks completeness.

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, 14 words, directly states purpose with no filler. Front-loaded and efficient.

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?

Tool is simple but lacks output schema. Description does not hint at return format (e.g., snapshot metadata, URL, status). Without annotations, more context about behavior and results would improve completeness.

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 50% (date parameter described). Description adds that date defaults to most recent, which is helpful. But url parameter lacks description and tool does not clarify expected format beyond 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?

Specific verb 'Get' and resource 'Wayback snapshot' clearly state the tool's purpose. The description distinguishes from siblings like 'list_snapshots' and 'fetch_archived_text' by specifying it retrieves the closest snapshot.

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

Usage Guidelines2/5

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. While sibling names imply other use cases, the description does not provide any when-to-use or when-not-to-use advice.

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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