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

Annotations already declare readOnlyHint=true and openWorldHint=false, so safety behavior is covered. The description adds useful behavioral context by stating the ordering is newest first and enumerating the kinds of events returned. It does not mention pagination behavior or how optional filters interact, so it adds moderate value beyond annotations.

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 definition is a single front-loaded sentence with no wasted words. It conveys the core resource, event types, and ordering efficiently.

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 five-parameter tool with low schema coverage and no output schema, the description is incomplete. It does not explain default pagination, how the since filter works, how hub scoping applies, or what the return shape looks like, leaving the agent to infer important invocation details.

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 only 40%, and the description does not compensate for the undocumented parameters. It mentions only a subset of the kind enum values (listed, verified, changed, expired) while omitting terms_updated, relisted, incident, and incident_resolved, and says nothing about hub, page, limit, or since.

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 a clear resource and scope: catalog changes across listed, verified, changed, and expired events, returned newest first. It is not a tautology and an agent can infer it is a chronological activity feed. However, it does not explicitly differentiate itself from sibling tools like search_free_ai_offers or get_status.

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 gives no explicit when-to-use guidance, no when-not-to-use conditions, and does not name any alternative tools. An agent must infer from the phrasing that this is for recent change history, but there are no decision rules for choosing it over search_free_ai_offers or get_offer.

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