bookmark_article

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

With no annotations, the description reveals the toggle behavior, which is important. However, it does not disclose any side effects, error states, or return behavior, leaving gaps for an agent.

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?

A single short sentence that conveys the core action without any fluff. Every word is necessary.

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?

For a simple one-parameter toggle tool, the description is fairly complete. It could mention if there's a limit or confirmation, but it suffices for the basic use case.

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% with description for article_id. The description adds no additional meaning beyond the schema, so baseline 3 is appropriate.

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 it's a toggle action for bookmarking/unbookmarking an article. The verb 'toggle' distinguishes it from single-action tools, but the verb is in Japanese (ブックマーク / ブックマーク解除). It's clear but not exceptional.

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?

No guidance on when to use this tool versus sibling tools like like_article or follow. Context of when to toggle a bookmark vs other interactions is absent.

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