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

Annotations already declare readOnlyHint and openWorldHint, so the safety profile is covered. The description adds modest value by specifying 'current' (freshness) and 'public section' (scope restriction), but says nothing about ordering, counts, or limits.

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 compact sentence that front-loads what the tool returns before stating the constraint. No filler, though it is terse enough that a little more detail could have been afforded.

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?

The tool is a single-parameter read with an output schema, so return values need not be explained. Scope and the parameter's provenance are covered, leaving only minor gaps around value format and result ordering.

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 0% and the single 'section' param is bare. The description compensates partially by stating it must come from inews_sections and that it targets one public section, but gives no format guidance (slug vs. display name vs. id).

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 verb (retrieve headlines) and resource (i headlines) with scope narrowed to 'one public section'. It is distinguishable from inews_article and inews_news by the headline-level, section-scoped framing, though it does not name those siblings explicitly.

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 clause 'section must come from inews_sections' gives a real prerequisite and points at the sibling that supplies valid values. However, there is no guidance on when to choose this over inews_news or inews_article, so usage is only partially covered.

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