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

Annotations already declare destructiveHint=true, idempotentHint=true and readOnlyHint=false, so safety is covered. The description adds genuinely non-derivable behavior: partial success semantics ('each article succeeds or fails on its own') and that the result enumerates both outcomes — important for a bulk destructive call, and not present in the annotations.

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?

Two tight sentences, front-loaded with the operation and limit, then the failure-isolation contract. No filler.

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?

An output schema exists, so return-format detail is not required, and annotations cover the safety profile. The description still needs to carry the per-item parameter semantics it currently outsources to replace_article, which is the main remaining gap.

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 is the only prose source, yet it tells the agent nothing about the per-item fields (article_id, html, slug, title, meta_description) beyond delegating to replace_article. It does add the 50-item bound and the array-of-articles shape, but the nested field semantics are left entirely undocumented.

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 and resource (replace articles) plus scope (up to 50 per call), and differentiates itself from the single-item sibling replace_article via the bulk framing. The deferral 'same rules as replace_article' means the agent must consult that sibling for field-level meaning, which slightly weakens standalone clarity.

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?

Usage is implied by the bulk framing and the explicit 50-item cap, which distinguishes it from replace_article, but there is no explicit when-to-use / when-not guidance, no prerequisites, and no statement of what happens if more than 50 are submitted.

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