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

With no annotations, the description carries the full behavioral burden; it does disclose the three return values (address, avatar, url), which is genuinely useful given there is no output schema. It is silent on failure behavior for unregistered subnames, whether resolution touches the chain or is cached, and freshness of the returned records.

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?

One tightly packed sentence with the action and its outputs front-loaded and zero filler. Nothing is padded, though the angle-bracket placeholder makes the format hint marginally harder to parse than plain prose would.

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 one-parameter lookup with no annotations and no output schema, the minimum viable facts are present: what it resolves, what comes back. It falls short on the edge cases an agent will hit in practice (unknown name, malformed input) and on whether resolution is on-chain or off-chain.

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% for the single required `name` parameter, so the description must compensate. It partly does, showing the expected shape via the `<id>.punks.generated.eth` example and noting any ENS name is accepted, but it does not state whether a bare label, a full name with TLD, or a hex address is tolerated.

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 uses a specific verb ("Resolve") with a specific resource (an ENS name, e.g. <id>.punks.generated.eth) and even names the outputs (address, avatar, url). It is clear enough to act on, though it never positions itself against any sibling, and the `<id>` placeholder in the example is slightly ambiguous.

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?

There is no guidance on when to reach for this tool versus the many marketplace/orchestration siblings (get_token, get_status, erc8004_register_punk), nor when not to. The only usage signal is the parenthetical that any ENS name is acceptable, which is a scope note rather than a when-to-use rule.

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