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

The annotations already declare readOnlyHint, idempotentHint, openWorldHint=false and destructiveHint=false, so the safety profile is covered. The description adds a real interpretive constraint ('listing them does not approve a faster reply'), which is useful context beyond the annotations, but it says nothing about pagination, result volume, missing/retired windows, or authorization needs.

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, front-loaded with the core action, and each sentence carries distinct information. Minor inefficiency in the slightly indirect phrasing of the second and third sentences, but nothing is wasted.

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-value documentation is not required, and the safety profile is carried by annotations. The remaining gap is parameter semantics: with 0% schema coverage and an undocumented includeRetired filter, an agent cannot fully predict how filtering works. Adequate but incomplete for a 3-parameter 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 description coverage is 0% across three parameters, so the description must compensate and largely does not. It only implies the plan scoping that catalogId + planId represent, and gives no hint at all about includeRetired (default false) or why both a catalog and a plan identifier are required.

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 gives a specific verb and resource ('Read reply windows') plus scope ('for one customer plan'), which cleanly separates it from the write sibling save_reply_window. It stops short of explicitly distinguishing itself from other list_* siblings such as list_plan_channels or list_response_catalogs, so it is clear but not fully differentiating.

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 provides concrete when-to-use guidance by naming an alternative path: call evaluate_support_promise with the exact wording before promising a faster reply. However, it offers no guidance on when listing is the right initial step versus other read tools, and no preconditions for the catalogId/planId pair.

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