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

Annotations already declare readOnlyHint=true and openWorldHint=true, so safety is covered. The description adds that results are 'current' and scoped to 'one public section,' plus the validation constraint on section origin, but it omits return format details or rate/recency 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 tight sentence with the scope front-loaded and the prerequisite attached after a semicolon. No filler; every clause carries actionable 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?

For a simple, read-only headline fetcher with a full output schema and annotations, the description covers purpose, scope, and the key input prerequisite. Minor gaps like pagination or invalid-section behavior are acceptable given the output schema exists.

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% and the schema already lists documented values ('news, sports'). The description adds useful meaning by stating the section must come from tmz_sections, indicating the canonical source for valid slugs beyond the static examples.

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?

The description states a specific resource and scope ('Current TMZ headlines for one public section'), clearly identifying the operation. It references tmz_sections as the source of the section argument but stops short of explicitly contrasting this tool with siblings like tmz_news or tmz_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?

It provides a clear prerequisite: 'section must come from tmz_sections,' telling the agent how to obtain a valid input. However, it does not state when to prefer this tool over alternatives (e.g., tmz_news for broader coverage) or any exclusions.

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