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

The description thoroughly explains the authentication process, including opening a browser, copying URLs, and conditions for automatic vs manual completion. Annotations indicate mutation (readOnlyHint false) and side effects (openWorldHint true), which align with the description.

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 informative and well-structured, but slightly verbose. It could be split into shorter sentences, but no unnecessary information is present.

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 description covers prerequisites, the authentication flow, potential issues, and fallback to submit_mal_redirect. It is complete given the tool's complexity and lack of parameters.

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 no properties, so the description compensates by explaining the tool's behavior and workflow. No additional parameter details are needed.

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 that the tool authorizes personal-list tools with a MyAnimeList account. It uses specific verbs ('Authorize', 'one-time') and distinguishes from sibling tools like submit_mal_redirect by explaining the authentication flow.

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 states this is a prerequisite for personal-list tools and provides step-by-step instructions. It also guides when to use submit_mal_redirect as an alternative when automatic callback fails (e.g., remote host or busy port).

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