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

Annotations already declare readOnlyHint=true, destructiveHint=false and openWorldHint=false, so the safety profile is covered. The description adds behavioral value beyond that by disclosing the sort order ('newest first'), which the annotations and schema do not convey, though pagination or locale-influence behavior is not addressed.

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?

Three front-loaded sentences; the first two carry the essential purpose and ordering, the third the chaining hint. The explainer definition sentence is longer but earns its place by clarifying the resource, leaving little waste.

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?

An output schema exists, so return-structure explanation is unnecessary, and the chaining to get_explainer is covered. However, with 0% schema coverage on limit and locale and no mention of them, the definition is incomplete for a listing tool whose filtering behavior an agent needs to know.

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% for two parameters (limit, locale), and the description never mentions either. It gives no meaning for limit bounds/default or for what the locale enum changes about the returned explainers, so the description fails to compensate for the schema gap.

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?

States a specific verb and resource ('Lists Pollar's latest explainers') plus the ordering ('newest first'), and then defines what an explainer is so an agent understands the resource type. It also routes to the sibling 'get_explainer' via the returned eventSlug, cleanly separating list from fetch.

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?

Provides clear context for the list-then-fetch workflow by naming get_explainer and the eventSlug handoff. It does not state when to prefer this over other discovery siblings such as search_news or list_top_news, so exclusions are implicit rather than explicit.

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