Alldomains Register Domain

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

Discloses operation class as write, consistent with annotations (readOnlyHint=false). Adds context about needing to confirm terms before writes, which is helpful beyond what annotations provide.

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?

Four sentences, well-structured. Front-loads main purpose, then context, then usage guidance. Could be slightly tighter but overall concise and clear.

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?

Covers purpose, usage condition, and behavioral advice. Output schema exists, so return value documentation is not required. Complete enough for agent to use 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 covers all 3 parameters fully (100% coverage). Description adds examples for domain and clarifies TLD support, but does not significantly extend beyond schema definitions.

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 tool's function: registering a domain on AllDomains, supporting multiple TLDs. It also distinguishes from SNS-specific tools by noting when to use this tool instead.

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 advises to use only when the name service is not SNS-specific, and recommends confirming domain, TLD, owner, and terms before writes, providing clear guidance on when and how to use.

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