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

Annotations already declare readOnlyHint, idempotentHint, non-destructive and closed-world, so safety is covered. The description adds that results include aggregate record and dataset counts, which is useful extra context, but does not describe pagination, ordering, or volume.

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 front-loaded sentence with no filler. Every clause earns its place by naming the resource and the returned aggregates.

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 with annotations covering safety and no output schema, the description is nearly sufficient. It could be improved by noting ordering or that the list is unfiltered/complete, but nothing essential to invocation is missing.

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?

Zero parameters, so no parameter semantics are required; baseline 4 applies. The description's note about aggregate counts is output-oriented, not parameter-oriented, but nothing is missing on the input side.

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?

States a specific verb (List) and resource (contractor trades) and adds scope detail (with aggregate record and dataset counts). This distinguishes it from sibling listing tools like list_cities/list_states primarily by resource, though no sibling is named to rule out overlap.

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?

No when-to-use guidance, no conditions, and no reference to any sibling. The agent must infer that this is the entry point for enumerating trades, but nothing states when this is preferred over search_datasets or get_coverage.

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