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

No annotations exist, so the description carries the full behavioral burden, and it does not state whether the month parameter is optional (0 required params suggests a default) or what happens when it is omitted. It discloses scope (includes undated/announced-only works) but nothing about ordering, pagination, or permissions.

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 compact sentence with no filler, front-loaded on the monthly calendar scope. Slightly terse for a description that has to carry meaning on its own, but nothing wastes space.

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 no annotations and no output schema, the description needs to stand alone; it covers what content is returned but omits the behavior of the optional month argument and any ordering/paging expectations. Adequate but with clear gaps for a discovery-style listing tool.

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 the single 'month' parameter is self-documented as YYYY-MM. The description's 'by month' phrasing maps to the parameter but adds no format, default, or range detail beyond the schema, so the baseline 3 applies.

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 and scope: a month-based calendar of releases/broadcasts, plus a distinct second category (titles with only an announced period and no fixed date). An agent can tell what content it returns, though the verb is implicit and it does not contrast itself with siblings like release_countdown or schedule_changes.

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: an agent can infer this is the tool for browsing a monthly calendar rather than counting down to a specific title. No explicit when-to-use, when-not-to-use, or alternative routing against release_countdown/schedule_changes is provided.

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