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

Goes well beyond the annotations: warns it is 'Slow (three generation steps, several minutes)', discloses budget cost ('roughly a full builder session of LLM budget'), states the side effect ('Saves the result as a builder draft'), and confirms 'Nothing is published' — consistent with destructiveHint=false and readOnlyHint=false.

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 sentences, front-loaded with the action, followed by cost/latency warnings and then the output shape plus publishing hand-off. Every sentence carries distinct, decision-relevant information with no padding.

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 heavy multi-step tool with no output schema, it supplies the return shape { draftId, title, titles, outline, article } and the next-tool hand-off, which is what an agent needs most. The only real gap is the undocumented optional link/YouTube toggles that affect generation behavior.

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 only 33% (six of nine params undocumented, including locationId, useExternalLinks, useInternalLinks, useYouTubeVideos, youtubeChannelUrl). The description only touches `urls` (article to scrape), `title` and `prompt`, and its notes on title/prompt largely restate the schema's own descriptions, so it does not compensate for the coverage gap.

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 action ('Run the whole Article Builder in one go for a rewrite') with the resource being remixed (the article at `urls`). It implicitly and clearly distinguishes itself from the step-by-step siblings (generate_titles, generate_outline, write_from_outline) by framing itself as the whole pipeline in one call.

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?

Explains when to use it (rewriting an existing article at a URL with a fresh angle) and routes the agent to the correct follow-up: 'Nothing is published: review it, then publish_article_from_builder with the draftId.' It doesn't explicitly name the manual step-by-step alternatives for comparison, so the contrast with siblings is inferable rather than spelled out.

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