set_date_options

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

With no annotations, the description carries the full behavioral burden. It implies a mutation but says nothing about whether existing week calculations are recomputed, whether the change is reversible, or what permissions are required. The presence of an output schema covers return values, but the mutation semantics remain undisclosed.

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?

One tight sentence with the action and scope front-loaded and no filler. It is efficient, though the brevity is partly under-specification rather than pure economy.

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 simple one-parameter setter with an output schema, the core idea is conveyed. However, with no annotations and an undocumented enum-like parameter, the allowed values and effect on existing calculations are missing, leaving the definition only minimally 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 single parameter 'start_of_week' has 0% schema description coverage, so the description must compensate. It conveys only the general concept ('weekday origin') and never names the parameter or lists valid values, despite the schema default hinting at a discrete set like sunday/monday.

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 ('Set') and resource ('datasource weekday origin') with the scope it affects ('date-part headers and week calculations'). It is distinguishable from otherwise-similar date tools like set_field_fiscal_year_start, though it does not name any sibling explicitly.

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?

There is no when-to-use guidance, no prerequisite context, and no mention of the nearest alternative (set_field_fiscal_year_start), which also configures a date-related setting. The agent must infer usage entirely from the purpose sentence.

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