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

Annotations already cover the safety profile (readOnly, idempotent, non-destructive, closed-world), so the bar is lower. The description adds genuinely useful behavior beyond that: the three categorical outcomes with a link, and the important non-blocking guarantee that a close match does not prevent submission.

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?

Three short, front-loaded sentences with no filler; the purpose leads and the return labels follow. The trailing '[no key]' fragment is an artifact that adds no value, and the outcome list partially duplicates the output schema.

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?

With an output schema present, the description need not explain return shape, and it appropriately stops at naming the categories. For a two-parameter read-only check, an agent has enough to invoke it correctly; only explicit workflow routing is missing.

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 0%, so the description must compensate, and it does: it names both parameters and explicitly marks the draft as optional while framing the title as the primary input. Length limits (180/8000) are left to the schema, which is acceptable since they are machine-readable there.

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?

States a specific verb (compare) and both resources (a proposed title/optional draft vs. published articles), plus the three named outcome labels. An agent can distinguish this from siblings like propose_new_article or suggest_article_change without opening any schema.

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 note that 'a close match does not block a submission' implies this is a pre-submission check, but the description never explicitly says when to call it or names an alternative such as propose_new_article. Usage is inferable rather than stated.

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