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

Annotations already indicate readOnlyHint true, destructiveHint false, idempotentHint true, covering safety. Description adds useful context about output fields and date filtering, but doesn't mention pagination, rate limits, or data freshness beyond what annotations provide.

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?

Single sentence packs key information: resource (company news), action (fetch), output fields, and filter capability. No redundancy, perfectly concise.

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?

With output schema present and simple structure, description is sufficient. Could mention pagination or data limits, but for a basic list tool it covers essentials.

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 100% with good descriptions for each parameter. Description reinforces date filtering and adds context about the output (headline, source, etc.), enhancing understanding beyond schema.

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?

Description clearly states it fetches latest news articles for a specific company with key fields like headline, source, summary, date, image. It distinguishes from other news tools by focusing on a single company, but doesn't explicitly compare to siblings like stocks.market.news.

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?

No explicit guidance on when to use this vs. alternatives (e.g., stocks.market.news, news.global.latest). The description implies use for company-specific news but fails to set boundaries.

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