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

Annotations already declare readOnlyHint=true and openWorldHint=true, covering the safety profile. The description adds useful constraints — results are 'current', scoped to 'one' section, and only 'public' sections are valid — but says nothing about pagination, result volume, or freshness window.

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?

A single tight sentence with the resource and the key constraint front-loaded. No filler, and the prerequisite is attached to the parameter it governs.

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 described, and annotations cover the read-only/open-world profile. The remaining need — where section values come from — is addressed, making it essentially complete for a one-param tool.

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%, so the description must carry the parameter meaning, and it does: the single 'section' argument must be drawn from philstar_sections, and only public sections are valid. That is meaningful guidance beyond the bare string type, though no format examples are given.

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+resource ('Current Philstar headlines') with scope ('one public section'). It clearly identifies the resource and the single-section constraint, though it doesn't explicitly contrast against sibling philstar_news or philstar_article.

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?

Gives an explicit prerequisite: the section value must come from philstar_sections, which tells the agent to call that tool first. It stops short of naming when-not-to-use or contrasting with philstar_news, but the dependency guidance is concrete.

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