register_ens_name

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

No annotations are provided, so the description carries the full burden of behavioral disclosure. It mentions the commit-reveal process, which is a key behavioral trait, but fails to disclose that this is an on-chain transaction requiring gas fees, that it likely sends a transaction using the private key, or what the return value will be. The description is too thin for a mutation tool with this complexity.

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, front-loaded sentence that immediately states the action and the key constraint (commit-reveal). No word is wasted, and the sentence is easy to parse for an AI agent.

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 tool performs a complex multi-step on-chain operation with no annotations and no output schema. The description only mentions the commit-reveal process but does not explain the full flow, whether the tool handles both steps, prerequisites like name availability or ETH balance, or what the response contains (e.g., transaction hash). This is insufficient for an agent to understand the full scope of the operation.

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?

The input schema has 100% description coverage for all five parameters, so the schema already provides meaning. The description adds no additional context about how parameters relate to the commit-reveal process (e.g., how duration affects cost, what the ownerAddress default implies). Baseline of 3 is appropriate since the schema carries the semantic load.

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 clearly states the action: 'Register a new ENS name via ETH Registrar Controller'. This is a specific verb+resource combination that distinguishes it from sibling tools like renew_ens, transfer_ens, or set_ens_records. The 'new' qualifier also disambiguates from renewal or updates.

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 implicitly indicates usage for registering a new ENS name, but does not provide explicit when-to-use or when-not-to-use guidance relative to alternatives like check_ens_availability or renew_ens. The mention of the commit-reveal process hints at prerequisites but does not explain when this should be invoked instead of other ENS operations.

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