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

With no annotations, the description carries the full burden and does well: it discloses the paywall, the 25-item limit, the sorting behavior, and that the return value is x402 payment instructions with accepted payment methods. It could mention error behavior for invalid ids, but the key behavioral traits are covered.

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?

Two dense sentences lead with the most important constraint (PAYWALLED), then max size, ordering, return value, cost, payment methods, and the free alternative. Every sentence 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?

The input is simple, but there is no output schema, so the description correctly explains what is returned (x402 payment instructions) and how payment is made. It does not detail how the returned instructions should be executed, which is a minor gap for an agent that must complete the payment flow.

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 coverage is 100% and the single 'ids' parameter is already described as 'Up to 25 token addresses or pool ids.' The description mostly restates this limit and adds the Arc token context, but does not add meaningful semantic detail beyond the schema.

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 states a specific action: bulk Arc token/pool exit checks for up to 25 ids, with a defined ordering ('worst first'). It is clearly distinguished from the sibling arc_exit_check by naming it as the free single-check alternative.

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?

Explicitly says bulk calls are paywalled and cost $1, then routes single-check use cases to the free arc_exit_check sibling. This gives an agent clear conditions for choosing between the bulk and single tools.

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