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

Annotations already declare readOnlyHint=true and openWorldHint=true, so the safety profile is covered. The description adds only the word 'Current' (freshness implication) and the enumeration constraint. For a read-only list tool with no pagination or auth details, this is adequate but thin.

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 resource, followed by the scope and the value constraint. No filler words; every clause carries information.

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?

Since an output schema exists, return values need not be described. The description covers what the tool returns, the scope, and where the required parameter value comes from. Minor gaps remain, such as whether results are ordered or time-bounded.

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% and the single 'section' parameter has no inline documentation, so the description must carry the semantic load. It does add meaningful value by specifying that the value must be sourced from nationalpost_sections, which is exactly the missing constraint. Format examples for section slugs are still absent.

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 resource and verb-equivalent ('Current National Post headlines') plus a scope constraint ('for one public section'), which separates it from nationalpost_news and nationalpost_article. It does not explicitly name the alternative tools, so it falls short of a 5.

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 and routing instruction: the section value 'must come from nationalpost_sections.' That tells the agent which sibling to call first. It stops short of stating when-not-to-use (e.g., use nationalpost_news for all sections at once).

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