Lucky Day of Week

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

Annotations already declare readOnlyHint=true, destructiveHint=false, idempotentHint=true. The description adds no behavioral context beyond the annotations, such as how the lucky day is determined or if it requires a full birth chart. It does not contradict annotations, but also does not add value.

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 very short: one sentence plus example. While concise, it lacks structure and does not earn its place fully. The group label 'Financial Astrology' helps, but overall it could be more informative without losing brevity.

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?

No output schema is present, so the description should explain what the tool returns. The description says 'Days traditionally aligned with the sign' but does not clarify if it returns a single day, multiple days, or additional context. For a tool with 7 parameters, the description is incomplete and leaves the agent guessing about results.

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 baseline is 3. The description provides an example request body but no additional meaning for parameters beyond what the schema defines. For instance, it does not explain how latitude/longitude affect results or what houseSystem means in this context.

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 description 'Days traditionally aligned with the sign' is vague. It does not specify which sign (presumably zodiac sign from birth chart) or what constitutes a lucky day. The title 'Lucky Day of Week' suggests output is a day of the week, but the description does not confirm this. Sibling tools like 'financial_lucky_numbers' have clearer purposes, making this tool's purpose ambiguous.

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?

No guidance on when to use this tool versus alternatives. The description provides no context for usage, e.g., whether it is for selecting auspicious days for financial decisions or general luck. Sibling tools like 'financial_market_timing' suggest similar domains but no differentiation is given.

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