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

Annotations already cover the safety profile (readOnly, idempotent, non-destructive, closed-world), so the bar is lower. The description adds genuinely non-obvious behavior: premium and delayed items return teasers rather than full content, which tells the agent to expect truncated results. This is real value beyond the structured fields.

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?

A single efficient sentence with no filler; the return-content caveat is stated compactly. It is slightly under-specified rather than over-verbose, which is the right failure mode here.

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 one-optional-param list tool with no output schema, the description covers the key behavioral surprise (teasers) but omits default page size, ordering/recency semantics, and any usage context. Adequate but with clear gaps for an agent deciding when and how to call it.

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 carry the parameter burden, and it says nothing about `limit`. The parameter is self-explanatory and its bounds/default are fully specified in the schema (min 1, max 20, default 10), so no meaning is lost, but the description adds nothing beyond it.

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 names a specific resource and scope ('latest published news'), so an agent knows what content it returns. However, there is no verb (fetch/list/retrieve) and no differentiation from siblings like `search` or `list_lessons`, leaving the tool's exact role in the family ambiguous.

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?

There is no when-to-use guidance, no mention of alternatives (e.g. `search`), and no prerequisites or auth conditions stated. The agent must infer the tool's place in the workflow entirely from the name.

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