renew_ens_name

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

No annotations are provided, so the description carries full burden. It discloses key behaviors: returns transaction data rather than sending it, includes a 5% pricing buffer with refund, and bundles batch renewals into a single Multicall3 transaction. It also clarifies there is no minimum duration, which is important behavioral info.

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 moderately long but well-structured with bullet points and examples. Every sentence adds distinct value: simplicity, flexibility, permissions, pricing, and batch behavior. There is no redundancy with the schema.

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?

Since there is no output schema, the description adequately explains the return value: transaction data with exact pricing including a 5% buffer. It also covers batch renewal behavior and refund policy, making the tool self-sufficient for an agent to invoke correctly.

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%, so baseline is 3, but the description adds practical meaning beyond the schema: it gives example durations, clarifies that 'years' is deprecated, states the default for duration, and emphasizes no minimum. This provides real usage context.

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 the specific verb 'Renew' with resource 'ENS name or batch of names' and states the return value (transaction data). It clearly distinguishes this from sibling registration tools like purchase_name or bulk_register by emphasizing the simple, single-transaction nature.

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 explicitly contrasts renewal with registration, noting no commit/reveal is needed. It also states anyone can renew any name and lists concrete use cases such as gifting and protecting names, giving strong guidance on when to use this tool.

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