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

The description contradicts the annotations: it states 'no outbound actions' and 'no external research' while openWorldHint is true, which signals possible outside-world interaction. It also discloses payment and wallet authorization, but because of the direct contradiction, per rubric this dimension must score 1.

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?

Four compact sentences, each adding unique information: scope/deliverables, input limits, output nature, price/payment requirement. No filler and the core action is front-loaded.

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?

The plan output, price, and human-review workflow are covered, but the description doesn't explain how to supply the required brief/source_text precisely, nor the expiry/idempotency/result-signature fields. Given no output schema and contradictory open-world behavior, the description is not complete enough 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 0% schema description coverage, the description must explain the parameters, but it only hints at buyer-supplied source input, audience, and wallet authorization. result_expires, idempotency_key, and result_signature receive no explanation, leaving important payment/result-signing fields opaque.

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 leads with an explicit verb and resource: 'Build a phased launch plan', then enumerates concrete deliverables (audience, positioning, channel actions, dependencies, success measures). This is specific enough to distinguish it from generic plan tools such as project_plan or business_plan_outline.

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?

It clearly scopes input constraints ('Uses buyer-supplied information only') and states exclusions ('no external research or outbound actions') plus the draft-for-review nature. It does not name alternative sibling tools, so it stops short of full when-to-use/when-not-to-use guidance.

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