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

Annotations already declare readOnlyHint=true, idempotentHint=true, and destructiveHint=false. The description adds useful behavioral detail beyond that by specifying the verdict categories (fits / conflict / check / unknown) and the ask_vendor behavior that reports exactly which values are missing to decide.

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?

This is one very long, run-on sentence that compresses dozens of interface checks into a single block. The content is informative, but the lack of bullet points or paragraph separation makes it difficult to parse. It is front-loaded with the core purpose, yet the enormous checklist hurts readability.

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 complex compatibility-checking tool with no output schema, the description does a good job of explaining what is checked and what verdicts are returned, including the ask_vendor fallback. It is missing only minor details such as how quantities affect the fit check or the exact structure of the returned verdicts.

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 input schema covers 100% of the single parameter's semantics: items is described as products of the spacecraft, deployer or ground segment, and each item has an id and optional qty. The description does not add parameter-level detail, but the baseline of 3 applies because the schema already carries the load.

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 opens with a specific verb and resource: 'Check whether a set of products docks together,' followed by an exhaustive enumeration of the interface checks performed. This makes the tool's purpose unmistakable and distinguishes it from match_components, which is about finding compatible parts rather than verifying a given set.

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 intended use is implied by the purpose: call this after a set of products has been identified, likely following match_components. However, the description never explicitly says when to use this tool versus siblings, nor does it state when not to use it or suggest an alternative.

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