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

The description adds a valuable behavioral guarantee: a packed line with no ordered line is reported, never dropped. This edge-case disclosure goes beyond the annotations, which are all false and provide no safety or mutation hints. It does not mention side effects, but the reporting framing suggests a non-mutating operation.

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 compact sentences with no filler. The first sentence front-loads the comparison and the three output categories; the second adds a concise, meaningful edge-case guarantee. Every word earns its place.

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 single-parameter reporting tool, the description covers purpose, scope, and a key edge case, and the schema handles parameter semantics. The only minor gap is that with no output schema, the exact response shape is not specified, though 'line by line' and the listed categories give a reasonable picture.

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 100%, and the schema already explains the packing_list parameter well, including an example and the order-reference fallback. The tool description adds no additional parameter-level detail, so the baseline of 3 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 clearly defines the tool as a comparison of ordered versus packed lines and enumerates three specific result categories: short, over-packed, and packed-but-not-ordered. This makes the tool's scope unmistakable and distinguishes it from siblings like packing_expect or packing_slip, even without naming them.

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?

Usage context is implied: this is the discrepancy report to consult after packing to find shortages or overages. However, it does not explicitly say when to prefer this over related tools such as packing_expect or packing_slip, nor does it give exclusions or prerequisites.

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