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

With no annotations, the description carries the full behavioral burden. It adds a little context (the operation is free, the sample is redacted), but says nothing about read-only nature, pagination, or auth requirements, which is thin for a listing endpoint.

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?

Two sentences, the second being a fragment describing the lead contents. It is short but the phrasing is promotional and not front-loaded around the tool's function.

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?

An output schema exists, so return-value exposition is not required, and the description does indicate what the packs contain. However, with no annotations and no routing information relative to buy_pack or lookup_lead, it stops short of being 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 takes zero parameters, so per the baseline a 4 applies. There are no arguments for the description to elaborate on.

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 conveys what the tool surfaces — B2B lead packs with sizes, prices, and a redacted sample — but it reads as marketing copy rather than stating the action plainly (it never says it returns/lists available packs). It also never differentiates itself from the sibling buy_pack, leaving the browse-vs-purchase distinction to inference.

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 explicit when-to-use guidance and no mention of the alternatives buy_pack or lookup_lead. The word "Free" faintly implies this is a no-cost browsing step before purchase, but that is left for the agent to infer.

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