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

Since there are no annotations, the description carries the full burden of behavioral disclosure. It clearly states 'It accepts no input and never authorizes payment,' which reveals key safety and side-effect traits. Additionally, terms like 'public' and 'fictional example' signal that the content is non-sensitive and non-real. This is strong transparency, though it omits details like authentication or rate limits.

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 exactly two sentences. The first sentence enumerates the four deliverables in a clear, scannable list. The second sentence adds crucial constraints without redundancy. Every word earns its place, and the most important information is front-loaded.

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?

With no output schema and no annotations, the description must provide complete context. It names the deliverables and explicitly notes no-input and no-payment authorization, which covers the essential operational behavior. However, it does not elaborate on the format or structure of the returned items, but for a zero-input tool with simple outputs, this is adequately 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 and the schema coverage is 100% with an empty properties object. The description reinforces this with 'accepts no input.' For a parameterless tool, the baseline is 4, and the description adds no unnecessary parameter detail, so this score is appropriate.

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 explicitly states the tool 'Return[s] the public replay procedure, fictional example audit, exact replay requirements, and an attributed no-card production trial.' The verb 'Return' combined with specific deliverables clearly defines the tool's purpose. The title 'Test Failed-Lead Replay Before Purchase' further distinguishes it from sibling tools by emphasizing the pre-purchase testing context.

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 does not explicitly state when to use this tool versus alternatives like get_leadproof_trial or get_leadproof_evaluation_path. The title implies usage for pre-purchase replay testing, but no direct comparisons or exclusions are provided. This gives implied usage context but lacks explicit guidance.

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