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

Annotations already declare readOnlyHint=true and openWorldHint=false, so the safety profile is covered. The description adds useful behavioral context: pagination (20 per page) and the inclusion of related objects and a status field. However, it lists status values (upcoming, inprogress, completed) that are inconsistent with the schema's timeline enum (upcoming, ongoing, past), which could mislead an agent about valid status values. This partial transparency earns a 3.

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 description is a single fragment sentence, which is concise but not well-structured. It lacks a clear subject-verb-object structure and mixes response content details with pagination. The most important element (that it lists maintenance windows) is implied by the title rather than stated. It is not front-loaded with the primary action, though it is short.

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 read-only list operation with optional parameters, the description covers the returned content (monitors, status pages, updates, status) and pagination, but it does not mention that the timeline parameter is optional or that omitting it returns all windows. The schema does cover this, but the description could have reinforced it. Since there is no output schema, the description should more explicitly describe the response shape, which it partially does. Overall, it is adequate but not fully complete.

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?

The input schema provides 100% coverage with clear descriptions for both page (zero-indexed, 20 per page) and timeline (enum, omit for all, newest first). The tool description does not add meaning beyond the schema; it merely repeats the pagination detail. Since the schema already does the heavy lifting, a baseline of 3 is appropriate.

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 title explicitly says 'List maintenance windows', and the description clarifies the scope by mentioning pagination and the included data (monitors, status pages, updates, status). It clearly refers to a plural resource, distinguishing it from get_maintenance_window. However, the description itself is a fragment without an explicit verb, so it relies on the title for the action.

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 provides no guidance on when to use this tool versus alternatives like get_maintenance_window (for a single window) or create/update/cancel/complete_maintenance_window. It does not mention any selection criteria or exclusions. The agent must infer usage from the tool name and schema.

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