ghl_countdown_list_timers

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

Annotations already declare readOnly/idempotent/non-destructive, so the bar is lower; the description still adds real context: location-scoped results, required Sub-Account token, and the exact OAuth scope. It does not describe the response envelope or default page size (limit defaults to 10 in schema), leaving a minor gap.

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?

Purpose and scope are front-loaded and the pagination hint is actionable. Minor waste from repeating 'List Countdown Timers' immediately before 'Get a paginated list of the countdown timers...' and from endpoint/source metadata that adds little for an agent.

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?

Six optional params, no output schema, annotations present: the description covers auth requirements, scope, and pagination, which is what an agent needs to invoke it correctly. Return-field shape is undescribed, but with no output schema that omission is tolerable rather than blocking.

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%, so the six filters (name, type, status, isExpired, limit, skip) are fully documented in the schema. The description only restates that limit/skip are pagination params, adding no syntax or semantics beyond the schema — baseline 3.

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?

States a specific verb (list/get) and resource (countdown timers) plus the scope constraint that timers are bound to the access token's location. It does not explicitly distinguish itself from the closely-named sibling ghl_countdown_list_timer_templates or ghl_countdown_get_timer, which costs it the top mark.

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 implied by 'paginated list' and the token/scope prerequisites are spelled out, but there is no explicit guidance on when to choose this over list_timer_templates or get_timer for a single record. Alternatives are named nowhere.

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