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

Annotations already flag this as non-read-only, open-world, and non-idempotent; the description adds genuinely new context: 0.10 USDC per call on Base with 10 free signed-wallet calls per rolling 30 days, required product credentials/mandates/action grants, the guarantee that it supplies no server credentials or authority, and the POST endpoint. It stops short of describing what happens on payment failure, retry behavior for a non-idempotent call, or the shape of the returned plan.

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?

It is organized into payment, purpose, and boundary sections, but the lead is pricing rather than function, and boilerplate ("This adapter grants no authority and never supplies server credentials... bounded computation on caller-supplied data") repeats the same disclaimer twice. Several sentences could be merged without losing meaning.

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 tool with no output schema, the description does gesture at the return value ("read the ordered plan and required fields"), and it covers the x402 payment framing. But with 4 required params at 0% schema coverage, a nested constraints object, and a product_key enum, an agent still cannot determine what to put in the fields or which product_key applies to its situation.

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?

Schema description coverage is 0%, so the description must carry the burden, yet it explains none of the four parameters. Worse, it instructs the caller to "supply the task and supported steps," but the schema contains no task or steps field (only mode, agent_id, product_key, and a constraints object) — misleading guidance. The product_key enum's four values and the three include_* flags are never explained.

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?

"Turn a task into an ordered plan of supported computations, with the fields needed for each step" is a specific verb+resource and clearly identifies this as a planning/preparation tool rather than an executor. However, it never distinguishes itself from adjacent siblings such as wever_agent-decision-packet-rail or wever_agent-work-order-rail, and the actual purpose sentence is buried behind pricing boilerplate.

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 "Operating boundary" paragraph implies the context of use: supply a task, receive an ordered plan, then submit each step through its listed service, with human review of sequence and budget first. That is a useful workflow hint, but there is no explicit when-to-use/when-not-to-use guidance and no named alternative among the ~50 siblings.

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