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

No annotations are provided, so the description carries the full burden. It mentions the output (snapshot count, first/latest capture) but does not disclose any side effects, rate limits, authentication needs, or error behaviors. The read-only nature is implied but not explicit.

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 concise sentence with no unnecessary fluff. It is front-loaded with the core capability, though it omits essential parameter details.

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 tool with one parameter, the description is incomplete because it fails to explain the parameter or any usage context. While an output schema exists, its content is unknown; the description does not clarify what the agent can expect or how to construct a valid call.

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?

The schema defines a single optional parameter 'q' with default '', but the description never explains its meaning. Schema description coverage is 0%, so the agent has no way to know what 'q' represents (e.g., a URL, query string, or domain). This is a critical gap.

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 states the resource (Wayback Machine) and the specific output (snapshot count, first/latest capture). It is clear enough to distinguish from generic 'wayback' and other archive tools, though it doesn't explicitly name a sibling. The verb is implied but the purpose is specific.

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?

No guidance on when to use this tool versus the many siblings (e.g., wayback, archiveorg, commoncrawl). It does not state any exclusions or conditions for selection, leaving the agent to infer based on the name alone.

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