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

With no annotations, the description carries the burden of explaining behavior. It discloses that the verification concerns an append-only hash chain anchored to the Wayback Machine, which provides useful context. However, it does not state whether the operation is read-only, what it returns, or whether any external network dependency is involved.

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?

A single, front-loaded sentence that states the action and key context without waste. Every phrase earns its place, and the parenthetical clarifies the technical scope efficiently.

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 zero-parameter tool, the description is sufficient to identify the operation, but it omits expected outcomes such as whether the result is a success indicator, a report, or an error. Given no output schema and no annotations, a bit more explanation of the verification result would make it fully complete.

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 tool has zero parameters, so there is no parameter semantics burden to carry. The description is not required to explain inputs; the baseline of 4 applies because no parameter documentation is needed.

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 uses a specific verb ('Re-verify') and a clear resource ('the Public Register's hash chain'), with an explanatory parenthetical about append-only receipts and Wayback Machine anchoring. It clearly distinguishes this tool from the document/search-focused sibling tools.

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 tool is for verifying the integrity of the register, but it does not explicitly state when to use it versus alternatives or provide any usage context beyond the action. No when-not-to-use guidance is given.

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