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

No annotations are provided, so the description carries full responsibility. It discloses the return format (JSON array with specific fields, slot usage) and the authentication requirement (API key). This is sufficient for an agent to understand the tool's output and prerequisites. It could be slightly improved by explicitly stating that the operation is read-only and idempotent, but the current detail is solid.

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 three concise sentences with no wasted words. It front-loads the core purpose, then adds return structure and usage guidance. Every sentence earns its place, making it easy for an agent to parse quickly.

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?

Given there is no output schema, the description compensates by detailing the return fields (id, username, platform, watch status, etc.) and slot usage. It also ties to a sibling tool. However, it omits potential issues like pagination if the list is long, error handling, or rate limits. For a simple list tool, the description is mostly complete but has minor gaps.

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% for the single parameter (userId with description 'Ignored - derived from your API key'), so the baseline is 3. The tool description does not add any additional information about the parameter beyond what the schema already provides. No deduction is necessary, but no bonus either.

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 starts with a specific verb and resource: 'List every handle the account is monitoring.' This clearly distinguishes it from sibling tools like namesniper_watch (which adds a watch), namesniper_unwatch (which removes a watch), and namesniper_check (which checks availability). The purpose is unambiguous and well-scoped.

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 states the primary use case (listing monitored handles) and explicitly recommends using the returned watch id with namesniper_unwatch to stop monitoring, providing a clear usage path. However, it does not offer explicit guidance on when not to use this tool—e.g., when to prefer namesniper_check for immediate availability checks or namesniper_alternatives for suggestions. The context is clear but excludes alternative use cases.

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