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

Annotations already declare this a safe, idempotent, non-destructive read, so the description only needs to add operational context — and it does, by disclosing the default of 5, the 1–10 bound, and the two-part return order (outage notices first, then newest feed posts). It omits anything about freshness or failure behavior when the feed is unreachable, which keeps it from a 5.

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 short sentences ordered as trigger, parameter, return value — nothing is wasted and the most decision-relevant information comes first. It is a run-on block rather than clearly separated lines, which is the only structural weakness.

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 a single optional parameter, no output schema, and safety fully covered by annotations, the description carries the return-value burden and discharges it with a clear enumeration of fields. Only edge behavior (empty feed, stale data) is unaddressed, which is minor for this scope.

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 coverage is 100% and already documents count with min/max, so the baseline is 3; the description earns the bump by supplying the default value of 5, which the schema does not state and which an agent needs to reason about omitting the 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 names a concrete resource (Moda's news feed at modacommunities.com/updates plus outage notices) and a concrete content set (date, kind, title, summary, link), so an agent can distinguish it from siblings like search_moda_help or find_moda_groups without opening any schema.

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 gives explicit trigger conditions: what is new at Moda, whether a Moda group is down, or a recent launch/event/announcement. It does not name an alternative tool for overlapping questions (e.g. pointing help-article questions at search_moda_help), so it stops short of full when-not guidance.

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