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

The description contradicts the openWorldHint annotation: it claims 'no external research or outbound actions,' while openWorldHint=true indicates the tool may interact with the outside world. Payment requiring wallet authorization also suggests an outbound side effect, compounding the inconsistency.

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?

The description is concise and well-structured: what it does, how it scopes inputs, what it returns, and payment requirements are covered in three sentences. Every sentence adds necessary information with no filler.

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 paid, non-idempotent tool with five parameters, no output schema, and zero parameter descriptions, critical operational details are missing: exact required inputs, how payment authorization is provided, what the draft output contains, and how the source citations appear. The description gives a high-level overview but is incomplete for safe invocation.

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?

With schema description coverage at 0%, the description must compensate but only loosely maps to parameters by referring to 'supplied competitor information' and 'provided source.' It does not explain brief, audience, source_text, idempotency_key, result_expires, or the payment/signature parameters.

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 states a specific verb and resource: compare supplied competitor information using an explicit matrix and cite supporting sources. It also differentiates itself from external-research tools by explicitly saying it uses buyer-supplied information only and performs no external research.

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 gives clear context: use this when you have supplied competitor information, want a matrix-based comparison with source citations, and do not want external research. It does not explicitly name alternative tools or provide a when-not-to-use statement, so it stops short of full guidance.

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