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

Annotations already declare readOnlyHint, idempotentHint, destructiveHint=false and closed-world scope, so the safety profile is fully covered. The description adds value by disclosing what the result contains (starting rates, exclusions, source pages), which is useful given there is no output schema. It says nothing about ordering, pagination, or how often the public catalog changes, so it stops short of rich behavioral context.

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?

A single dense sentence with the scope front-loaded and no filler. It is slightly list-heavy in enumerating categories, but every clause (categories, rates, exclusions, source pages) conveys information an agent would otherwise have to discover by calling the tool.

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 zero-parameter read-only listing tool with complete annotation coverage and no output schema, the description supplies the essential missing piece: what the records contain. It is complete enough to call correctly, with only minor gaps around ordering and result size.

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; the baseline for parameterless tools is 4. No misleading parameter hints are present.

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 uses a specific verb ('List') and a named resource ('public PrepPort sourcing, product inspection, FBA preparation, storage and fulfillment services'), enumerating the categories so an agent knows exactly what comes back. It does not explicitly differentiate from the sibling tools estimate_prepport_base_cost and plan_prepport_first_job, and it slightly conflicts with the title's framing of 'Compare' rather than 'List', but the underlying purpose is unambiguous.

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 is implied: an agent would infer this is the catalog-browsing call to run before estimating or planning a job. However, the description never states when to use this versus the sibling cost-estimation or job-planning tools, and offers no exclusions or preconditions. This is minimum-viable guidance rather than explicit routing.

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