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

Annotations already declare readOnlyHint and idempotentHint, so the safety profile is covered. The description adds useful behavioral context by disclosing that the response aggregates related items of the same story, but says nothing about how many related items are returned, ordering, or how the story grouping is determined.

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 tightly written sentences, front-loaded with the tool's scope and followed by the accepted input formats. The second sentence partially duplicates the schema's parameter description, which is a minor redundancy rather than 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 single-parameter read tool with full schema coverage, no output schema, and safety hints already in annotations, the description covers what the tool does and what it accepts. The main remaining gap is the shape and size of the aggregated result set, which an agent would have to discover at call time.

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 100%; the single 'news' parameter already documents id, slug, and full URL formats. The description restates the same accepted formats without adding resolution rules (e.g. precedence if a slug collides, or what happens with a malformed URL), so the baseline of 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?

The description names a specific resource and scope: 'One gol24.uz news item together with all related news of the same story', with a concrete example (a transfer saga) that makes the aggregation behavior unambiguous. It does not explicitly contrast itself with siblings like latest_news or search_news, but the 'same story' framing is distinctive enough for an agent to infer the difference.

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 only implied: the mention of returning all related news signals this is for getting full story context rather than a single headline. There is no explicit when-to-use vs. when-to-prefer-latest_news-or-search_news guidance and no stated prerequisites.

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