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

Annotations already declare this is a read-only open-world call, so safety is covered. The description adds the useful constraint that it returns 'current' headlines for exactly one section, implying no cross-section aggregation, but says nothing about recency window, pagination, or result ordering.

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, no filler, and the dependency on mediaite_sections is front-loaded where the agent will see it.

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?

A single-param read tool with an output schema and clear annotations only needs the section-source rule and scope, both of which are present. Missing only return-size/pagination context, which is minor here.

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 carries the burden. It specifies the param is a section identifier and must be sourced from mediaite_sections, which is exactly the validation rule the agent needs. It does not give the value format (slug vs. name), leaving a small gap.

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 (returns headlines), a named source (Mediaite), and a named resource (one public section), which separates it cleanly from mediaite_article, mediaite_news, and mediaite_sections.

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 description tells the agent the section value must come from mediaite_sections, which is real routing guidance. It does not say when to prefer this over mediaite_news or mediaite_article, so it falls short of a full when/when-not spec.

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