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 usefully discloses the cost/profile ('Free, no wallet') and the scope of output ('two complete post-mortems from the archive'). However, it does not say whether the operation is read-only or whether it has any side effects, which is relevant for a tool with no annotation coverage.

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 extremely short and front-loads the most important information: free access and no wallet requirement. There is no filler, though writing it as a complete sentence with an explicit verb would improve structure.

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 with an output schema, the description is nearly complete: it conveys cost, authentication expectations, item count, and source. The main gap is that it doesn't clarify how this sample relates to or differs from sibling tools, but the simple interface keeps this from being a serious omission.

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 the schema fully covers parameter semantics. The description does not need to explain parameters, and it appropriately avoids inventing any. Baseline 4 applies.

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 identifies the resource ('two complete post-mortems from the archive') and a distinguishing condition ('Free, no wallet'), which makes the tool's purpose reasonably clear. However, it lacks an explicit action verb like 'retrieves' or 'provides', relying on the tool name 'sample' to complete the meaning.

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?

There is no guidance on when to use this tool versus siblings like search, archive, or precheck. The phrase 'Free, no wallet' implies a low-cost/preview use case, but the description never states when this sample should be requested or when another tool should be preferred.

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