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astroway

astroway-mcp

Official

HD Design Date

hd_design_date
Read-onlyIdempotent

Find the Design date for Human Design by calculating the moment 88° of solar arc before birth, revealing the unconscious imprinting point.

Instructions

Find the Design date (the moment 88° of solar arc before birth) for a given birth moment — the unconscious imprinting point.

[Group: Human Design] [Cost: 10 credits (Tier 1)]

Example request body: {"date":"1990-05-15","time":"14:30:00","timezoneOffset":3}

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
dateYes
timeYes
timezoneOffsetNo
latitudeNo
longitudeNo
houseSystemNoP
nameNo
cityNo
zodiacTypeNo
ayanamsaIdNo
cosmogramNo
Behavior3/5

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

Annotations already declare readOnlyHint=true, destructiveHint=false, idempotentHint=true, which cover safety. The description adds context about the astronomical quantity but does not disclose any additional behavioral traits beyond the annotations.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Conciseness4/5

Is the description appropriately sized, front-loaded, and free of redundancy?

The description is concise with two sentences, an example, and metadata. It front-loads the purpose. However, it could be more structured with explicit parameter explanations, but overall is efficient.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Completeness2/5

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

With 11 parameters and no output schema, the description lacks completeness. It does not describe the return format, response structure, or caveats. The complex parameter set is only partially addressed.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Parameters2/5

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

Schema description coverage is 0%, yet the description only explains date, time, and timezoneOffset via an example. The other 8 parameters (latitude, longitude, houseSystem, etc.) are not explained. The description does not compensate adequately for the missing schema descriptions.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Purpose5/5

Does the description clearly state what the tool does and how it differs from similar tools?

The description clearly states the tool computes the Design date (88° solar arc before birth), a specific Human Design concept. It uses a specific verb 'Find' and identifies the resource. Among sibling tools with hd_ prefix, this one is distinct.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Usage Guidelines3/5

Does the description explain when to use this tool, when not to, or what alternatives exist?

The description implies the tool is for Human Design calculations (Group: Human Design) but does not explicitly differentiate from other hd_ tools. No when-to-use or when-not-to-use guidance is provided.

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

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