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

With no annotations provided, the description carries the burden of behavioral disclosure. It explains that returned items include title, URL, published date (relative time), and content, and documents the `limit` default and maximum. It doesn't mention edge cases like error handling or sorting, but for a simple read-only fetch tool, this is adequate.

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?

The description is two sentences, front-loaded with the core function, and every sentence adds necessary detail. It's concise and well-structured with no redundant filler.

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?

The tool is simple with one optional parameter and no output schema. The description covers the return fields and the parameter's behavior, making it fully complete for an agent to select and invoke the tool without ambiguity.

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 100%, and the schema already fully describes the `limit` parameter (default 10, max 30). The description repeats the same information without adding new semantics, so it provides no additional value beyond the 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?

The description states 'Fetch the latest Steam news for Helldivers 2', which is a specific verb and resource. It clearly distinguishes itself from sibling tools that deal with game state (planets, assignments, war status) by focusing on external news items.

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 implicitly defines usage: use this when you need recent Steam news about Helldivers 2. It doesn't explicitly list exclusions or alternatives, but the niche is so distinct from the sibling tools that the context is clear.

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