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

With no annotations, the description carries the full behavioral burden, yet it discloses almost nothing: no auth or permission requirements, no indication of whether the sheet is static or regenerated, no sense of response shape. The parenthetical "(free)" hints at a cost tier but is not explained and could equally mean the resource is free-of-charge or a free-tier listing.

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?

It is short, but the brevity reflects under-specification rather than compression of real information. A single fragment with an unexplained parenthetical is not front-loading useful content.

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?

Zero parameters and no output schema lower the burden, but the description still never says what the pricing sheet contains, what format it returns, or how it relates to the probe/verdict workflow. For a free-form informational lookup with no structured fields to lean on, that gap matters.

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 there is nothing for the description to disambiguate and the baseline of 4 applies. No parameter confusion is possible here.

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 is a noun phrase, "Packet pricing sheet (free)," with no verb indicating retrieval or any other action. It names a resource but leaves ambiguous what a "packet" is (product packet vs. network packet) and whether this returns a static document or live pricing data, so an agent cannot confidently distinguish its role from siblings like get_verdict or run_probe.

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 call this tool, no exclusions, and no reference to the sibling tools get_verdict or run_probe. The agent is left to infer entirely from a three-word label.

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