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

With no annotations provided, the description carries the full burden of behavioral disclosure. It only says 'Submit an offer' and does not explain whether this is an on-chain transaction, whether funds are locked, whether the offer is binding, or what happens when it is accepted or expires.

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 a single sentence with no filler. The primary action and target are front-loaded, and every word contributes to understanding what the tool does.

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?

This is an unannotated financial/transactional tool with no output schema. The description omits important context such as what the tool returns, whether the buyer address must match the wallet making the call, and any follow-up behavior like offer acceptance or expiration.

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 100%, so the schema already documents all four parameters. The description adds only 'in ETH' and '.i domain', which are already reflected in the parameter descriptions; it does not provide additional parameter-level meaning.

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 verb ('Submit'), a specific resource ('an offer in ETH'), and a clear target ('any registered .i domain'). This clearly separates it from sibling tools like marketplace_accept_offer or marketplace_cancel_offer.

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 implies the tool is for proposing a purchase, but it does not explicitly say when to use it versus marketplace_buy_domain or marketplace_accept_offer. There are no alternatives mentioned, so the agent must infer usage from the word 'offer'.

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