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

With no annotations, the description must carry the behavioral load: it does disclose the payload shape and the alternate URL representations, which is genuinely useful. It stays silent on what happens for an unpublished, renamed, or nonexistent slug, and on any auth or rate-limit constraints, which is a real gap for an unannotated tool.

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?

One sentence with the resource and identifier up front and the return contents packed into a parenthetical. Nothing is redundant or bloated.

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 one-parameter tool with no output schema, enumerating the returned fields is exactly the right compensation and makes the payload predictable. The only shortfall is missing error behavior for slugs that don't resolve to a published article.

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% and the single parameter already documents "Published article slug." The description restates the same qualifier ("published ... article by slug") without adding format, encoding, or lookup-fallback detail, so baseline 3 applies.

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?

"Fetch one published Silicon News Wire article by slug" gives a specific verb plus a scoped resource, and the parenthetical enumerates exactly what comes back (headline, summary, body, canonical/.md/.json URLs). The singularity and slug-keyed access implicitly separate it from the plural wire.list and wire.search, though no sibling is named outright.

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 phrase "by slug" signals the precondition for calling it, which is useful routing information. However, it never states when to prefer this over wire.list or wire.search, nor what to do when only a query or title is known.

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