singapore_get_forecast_24h

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

Annotations already declare readOnly/idempotent/openWorld/non-destructive, so the safety profile is covered. The description adds genuine behavioral context about local timestamp grouping limits and pagination-token continuity, but the phrasing ('preserved upstream pagination token') is too opaque to be reliably actionable.

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?

Only three short sentences and the purpose is correctly front-loaded. However, the trailing two sentences are jargon-heavy and hard to parse, so brevity comes at the cost of comprehensibility rather than earning its place.

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?

The presence of an output schema relieves the description of explaining return values, and it does cover date defaults and pagination continuity. Still, with 7 parameters at 14% coverage, an agent lacks enough to fill in area, region, station_id, or limit confidently.

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 only 14%, so the description must compensate and largely does not: area, region, station_id, and limit are never explained. It does clarify the date default and hints at offset/pagination_token interplay, but the offset wording ('Consume local offsets before continuing...') is ambiguous rather than instructive.

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+resource: 'NEA 24-hour weather forecast', which implicitly distinguishes it from the sibling 2-hour and 4-day forecast tools. An agent can identify the resource and the forecast horizon without opening the schema.

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 only usage-adjacent statement is 'latest if omitted' about the date default. There is no guidance on when to pick this over singapore_get_forecast_2h or singapore_get_forecast_4day, and no prerequisites or exclusions are stated.

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