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

The annotations already cover read-only, idempotent, and closed-world behavior. The description adds meaningful context that no API key is required and that format=text returns one compact line, though it does not discuss rate limits or JSON-specific behavior.

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 three tight sentences with no waste. It front-loads the core purpose and follows with access and format details, each of which is useful.

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 one-parameter sample tool with no output schema, the description covers purpose, access requirements, covered data points, and text formatting. It could be slightly more complete by describing the JSON return shape or clarifying how the sample differs from a full brief.

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%, so the description must compensate. It explains that format=text produces a compact line, adding practical meaning beyond the enum and default; JSON behavior is only implied but still reasonably clear for a single optional parameter.

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 clearly states that this returns a free headline sample of the latest brief, including the specific data points covered. It distinguishes itself somewhat by being a 'sample,' but it does not explicitly contrast with the sibling get_latest_brief tool.

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 useful access context ('Open, no API key needed'), implying this is the lightweight/free option. However, it does not explicitly say when to use this instead of get_latest_brief or get_history, nor does it state limitations or exclusions.

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