ghl_countdown_list_timer_templates

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

Annotations already declare readOnlyHint, idempotentHint, and destructiveHint=false, so the bar is lower. The description still adds real value beyond them: the token type required, the exact OAuth scope, the endpoint and version header, and the scoping rule that timers belong to the access token's location.

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?

Front-loaded with the API context and a one-line summary, then endpoint and auth facts in compact form. The 'COUNTDOWN TIMER API' preamble and source-file citation are slightly ceremonial but each line carries actionable information.

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 parameters and no output schema, the description covers the essentials: what is returned (templates plus default design config), the auth requirement, and the scope. Only the response shape and whether the list is paginated are left unstated.

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 tool takes zero parameters, so there is nothing for the description to disambiguate and the baseline is 4. The schema is empty and additionalProperties is false, which is consistent with the description's no-argument framing.

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 and resource ('List Timer Templates' / 'Get the available countdown timer templates with their default design configuration'), which is more than a name restatement. It does not explicitly distinguish itself from the sibling ghl_countdown_list_timers, so an agent must infer the template-vs-timer split from naming alone.

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 supplies prerequisites (requires a Sub-Account/location token, scope countdown-timer/timer.readonly) which tell the agent when the call will succeed. It never states when to prefer this over ghl_countdown_list_timers or ghl_countdown_get_timer, so the usage decision is left implied.

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