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

Annotations already declare readOnlyHint, idempotentHint, and destructiveHint=false, so the safety profile is covered. The description adds '[no key]', signalling no authentication is required, which is genuine extra context, but it omits anything about rate limits, redirects from path to canonical URL, or error behavior for a missing article.

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 with the returned fields front-loaded and the input formats second. The trailing '[no key]' is terse to the point of being cryptic, slightly weakening an otherwise efficient sentence structure.

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 values need not be fully described, and the safety profile is carried by annotations. Combined with the input-format guidance, an agent has what it needs to invoke this correctly; only the missing sibling differentiation and dual-parameter conflict behavior keep it short of complete.

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 has to carry the parameter burden, and it does: it explains that either a bare slug or a full https://apologetics.wiki URL is acceptable distinct forms mapped onto the two schema properties. It doesn't clarify what happens if both slug and path are supplied, which is the remaining 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?

The description names a specific resource (one article) and enumerates exactly what is returned: title, description, key points, and canonical URL. That return-content specificity helps separate it from siblings like get_article and get_article_section, though it never explicitly contrasts itself with them.

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?

There is no statement of when to use this tool versus get_article, get_article_section, or search_articles. The only guidance is about input format ('Pass a slug, a path, or a full URL'), which belongs to parameters, not tool selection.

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