Challenge Cycles (vedic)

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

Annotations already declare readOnly, idempotent, non-destructive, closed-world behavior, so the bar is lower, yet the description adds real context beyond them: the derivation basis ('birth date components'), the endpoint, the required inputs, and a concrete cost of 10 credits (Tier 1). The billing/cost disclosure is genuinely useful for an agent deciding whether to invoke a read-only calculation.

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 core definition is a single front-loaded sentence with zero filler, followed by compact bracketed metadata. The metadata block is boilerplate but scannable and short; nothing is buried.

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?

An output schema exists, so return-shape explanation is unnecessary, and annotations cover the safety profile. What remains missing is how the four cycles relate to the inputs (age ranges, whether `name` affects any cycle) — relevant for a tool whose entire value is the derived cycles.

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 0%, so the description must carry the load. It says the result is 'derived from birth date components', which at least signals that `date` drives the computation, but it never explains what `name` contributes (a required field with a 2-120 char constraint) or what format `date` takes beyond the schema regex. An agent gets no semantics for one of the two required parameters.

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: 'Calculate four Challenge cycles' with the domain gloss 'life-area difficulties to master', and names the system ('Vedic') which separates it from the Chaldean, Kabbalistic, and Pythagorean *_challenge siblings. It stops short of explicitly contrasting those siblings, but the system label plus the group tag is enough for an agent to tell them apart.

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 statement of when to use this versus the other four challenge tools (chaldean_challenge, kabbalistic_challenge, pythagorean_challenge, etc.) or when a full chart would be preferable. The only routing signal is the 'Vedic system' label, which is inferential rather than an instruction.

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