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

The annotations declare readOnlyHint=false and openWorldHint=true, and the description usefully explains why: it 'saves the result in the user's Puley history', which reconciles a read-looking tool with a non-read-only hint. It also discloses a cost signal ('uses one read'), which is exactly the kind of quota context annotations cannot carry; it stops short of saying whether history entries can be removed or whether repeated calls are deduplicated.

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?

Front-loaded with what the tool returns before dropping into compact per-parameter notes; nearly every clause carries information. The telegraphic colon-list style is efficient but slightly dense, and the return-field enumeration overlaps with what an output schema would normally cover.

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 four parameters, no output schema and open-world scope, the description covers return shape, ordering, edition semantics, all enum-like values and a side-effect/cost note. The remaining gaps — defaults, history retention, and how results differ from google_results — are modest for a tool of this complexity.

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 carries the full burden and largely does: it gives country as two-letter codes with examples (US, GB, ZA, AU, IN), enumerates the legal period values (any, hour, day, week, month), and caps limit at 30. It omits the defaults (limit 12, period 'any', country 'US') and leaves query undescribed beyond 'about something', which keeps it from a 5.

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 news for a query, newest-first ordering, rendered as a country edition, with the exact fields returned listed. It is clearly distinct from siblings like find_videos or search_posts by virtue of the 'news' framing, but it never names a near-neighbour such as google_results or search_trends to say which to prefer.

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?

Usage is only implied by the resource name — an agent can infer 'use this to look up current news' but there is no explicit when-to-use, when-not, or alternative-naming guidance. No prerequisites (auth, plan, quota tier) are stated.

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