Wayback Machine snapshots

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

Annotations already declare readOnlyHint=true, openWorldHint=true, idempotentHint=true, and destructiveHint=false. The description adds useful behavioral detail beyond annotations by specifying ordering ('newest first') and that links to view snapshots are included, but it does not add much else about response behavior or limitations.

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

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

The description is a single well-formed sentence with no fluff, filler, or repetition. Key information is front-loaded: what the tool returns, the data source, ordering, and the link behavior.

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

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

For a read-only list tool with fully documented parameters and rich annotations, the description conveys the essential return content (archived snapshots, newest first, links to view). There is no output schema, but the description gives a minimally sufficient picture for an agent to interpret the response, even if field-level details are not specified.

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

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

Schema description coverage is 100%, so all five parameters are already documented in the input schema, including url semantics, defaults, and the match enum. The description adds no parameter-level meaning beyond what the schema provides, which matches the baseline expectation.

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

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

The description clearly identifies the resource (archived snapshots of a URL/site/domain in the Wayback Machine) and the output (newest first, with links to view each one). It is clear and distinguishable from the OSINT sibling tools, though it lacks an explicit verb like 'list' or 'retrieve', so it stops just short of the top tier.

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

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

The description implies the use case: when a user needs historical archived versions of a web resource from the Internet Archive. However, it does not mention when not to use it or name alternative sibling tools, so usage guidance is only implicitly conveyed.

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