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

No annotations are present, so the description carries the burden. It explicitly discloses the read-only nature, no provider call, and no payment, and lists the behavioral scope of what will be inspected: identity, contract, pricing, runtime, failure, trust, and invocation. This is meaningful transparency beyond the empty input schema.

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 that names the tool, lists its inspection scope, and states the key behavioral constraint. Every phrase earns its place with no redundancy.

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 discovery tool with an output schema present, the description is complete. It covers what will be discovered, confirms no side effects or cost, and the output schema presumably defines the return contract. Nothing needed for correct 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?

The tool has zero parameters and schema description coverage is 100%, so the description has no parameter burden to carry. The zero-parameter baseline applies, and the description does not need to add parameter semantics.

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 ('Discover and inspect') and a specific resource ('SeekAPI capability seller_public_profile_v0'), and enumerates what the discovery covers. It also differentiates from invoke_seller_public_profile_v0 by declaring it read-only with no provider call or payment.

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 clearly establishes this tool is for inspection/discovery rather than execution, saying 'Read-only; no provider call or payment.' It does not explicitly name sibling alternatives or state when to choose discover vs invoke, but the context is strong and unambiguous.

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