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

No annotations are provided, so the description carries the full behavioral disclosure burden. It helpfully reveals pricing tiers, the first-filing-free condition, and that the operation returns CLEARED or HELD, but it omits permissions, idempotency, what causes a HELD result, and the significance of consent_proof and countersignature.

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 a single efficient sentence with the core action front-loaded, followed by pricing and return values. It is compact and mostly earns its place, though the compressed 'standard/green' pricing phrase could be slightly clearer.

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 filing operation with four parameters, zero schema coverage, no annotations, and no output schema, the description is too thin. It covers purpose, fees, and return statuses but leaves parameter meanings, consent/countersignature requirements, and HELD implications unexplained.

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?

Schema description coverage is 0%, so the description must compensate for all four undocumented parameters. It mentions 'standard/green' price categories but does not explain payload, declared_code, consent_proof, or countersignature, leaving key required and optional inputs opaque.

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 states a specific verb and resource: 'File a pre-entry declaration,' which clearly identifies the operation. It does not explicitly differentiate this tool from siblings such as customs_cross, customs_status, or customs_verify_receipt, so it falls short of a 5.

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 gives no guidance on when to use this tool versus the sibling tools. It does not mention alternatives, prerequisites, or conditions that would route an agent to customs_cross, customs_status, or customs_verify_receipt instead.

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