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

Annotations already declare readOnlyHint, idempotentHint, openWorldHint and destructiveHint=false, so the safety profile is covered. The description's only added behavioral value is the id-prefix convention and the word 'full', which hints the record is more complete than a search hit but says nothing about field content or error behavior on unknown ids.

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, front-loaded with the action and resource, with the id-format parenthetical placed where it is most needed. Nothing is wasted.

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 this covers the input adequately, but with no output schema there is nothing anywhere describing what a 'full record' contains (fields, sizing, null behavior), which leaves a real 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 must carry the parameter. It usefully explains the id format and the two prefix families (n_ for news, s_ for sponsored), which meaningfully constrains what value to pass; it stops short of stating whether the prefix must match the requested record type.

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 clear verb+resource: retrieve the full record for a single item id, and even disambiguates the id namespace (n_… = news, s_… = sponsored). It does not differentiate itself from the sibling get_story or from search_news, so an agent cannot tell from the text alone which retrieval tool applies to a given id.

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: fetch this when you already have an id. There is no statement of when to prefer it over search_news, find_entities, or the confusingly similar get_story, and no prerequisites or exclusions are given.

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