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by astroway

Bhava Bala: house strength

astroway_vedic_bhavabala
Read-onlyIdempotent

Calculates the strength of all twelve Vedic houses using Bhavadhipati, Bhava Digbala, and Bhava Drishti Bala, returning each component, house rank, and the strongest and weakest house.

Instructions

Strength of the twelve houses per BPHS Adhyaya 27: Bhavadhipati Bala (the Shadbala of the house lord), Bhava Digbala (the four rasi classes, each strong in one direction), and Bhava Drishti Bala (net benefic minus malefic aspect on the bhava). Components returned separately, plus rank, strongest and weakest house.

[Group: Vedic] [Endpoint: POST /v1/vedic/bhavabala] [Required: date, time, latitude, longitude] [Cost: 20 credits (Tier 2)]

Input Schema

NameRequiredDescriptionDefault
cityNo
dateYes
nameNo
timeYes
ayanamsaNoSidereal school by name. Lahiri when omitted. Equivalent to ayanamsaId; send either.
latitudeYes
timezoneNoIANA zone name such as Europe/Kyiv, or auto to look the zone up from latitude and longitude. The server takes the offset that zone kept at this local date and time, summer time included, and uses it in place of timezoneOffset. A clock time that happened twice takes the first occurrence; one skipped when clocks went forward takes the offset from before the change. Abbreviations such as EST are refused. Before 1970 the tz database is not reliable for every place, so send timezoneOffset when the local clock is known.
cosmogramNo
longitudeYes
ayanamsaIdNo
zodiacTypeNo
houseSystemNoP
timezoneOffsetNoHours from UTC at the given moment, not minutes. Fractional zones are hours too: 5.5 for India, 5.75 for Nepal, -3.5 for Newfoundland. Defaults to 0, meaning UTC. Ignored when timezone is sent.

Output Schema

NameRequiredDescriptionDefault
typeNo
unitNo
housesNo
weakestNo
strongestNo

Schema Changelog

Changes observed during successful MCP inspections.

  1. Addedv1.6.0

TDQS

B3.4/5.0
Behavior4/5

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

Annotations already declare a read-only, idempotent, non-destructive, closed computation, so the safety bar is low. The description adds real context beyond them: components are returned separately, rank plus strongest/weakest house are included, the result is a POST endpoint, and it carries a concrete cost of 20 credits (Tier 2) — cost disclosure is genuinely useful for an agent deciding whether to call.

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 core definition is front-loaded in the first sentence with the returned fields in the second; the bracketed metadata block is compact and scannable. It is jargon-dense but every clause names a distinct component, so nothing reads as filler.

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

Completeness3/5

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

Return-value details are unnecessary since an output schema exists, and the annotations cover safety. But for a 13-parameter tool at 23% schema coverage, the description leaves meaningful ambiguity about sidereal defaults and house system that matter to correctness of a Vedic calculation.

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 only 23% across 13 parameters, so the description must compensate and it does not — it repeats only the four required fields already in the schema. Optional but consequential inputs (zodiacType, houseSystem, cosmogram, city/name) are left with no explanation anywhere in the description, so an agent gets no guidance on sidereal vs tropical or house-system choice for a Vedic calculation.

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

Purpose4/5

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

States a specific verb+resource (strength of the twelve houses) and enumerates the three computed components (Bhavadhipati, Bhava Digbala, Bhava Drishti Bala), including the BPHS source chapter. It implicitly separates itself from the planetary shadbala siblings by scope (houses, not planets), but never names a sibling explicitly.

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?

Usage is only inferable: an agent can deduce this is the house-strength counterpart to the planetary shadbala tools, but the description never says when to choose it over astroway_vedic_shadbala_full or the various bhava/house siblings. The 'Required: date, time, latitude, longitude' line is the only concrete call prerequisite surfaced.

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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