Jagannatha Hora — Vedic Astrology (Jyotish, Kundli, Horoscope, Panchang)

Special Lagnas

get_special_lagnas

Read-onlyIdempotent

Return the special (derived) lagnas of the chart. Each lagna maps to its 'sign' and 'longitude'. Includes 'pranapada_lagna', 'indu_lagna', 'bhrigu_bindhu_lagna', 'sree_lagna', 'kunda_lagna', 'bhava_lagna', 'hora_lagna', 'ghati_lagna' and 'vighati_lagna'. Data only — no interpretation is added.

Input Schema

TableJSON Schema

Name	Required	Description
`date`	Yes	Birth date in YYYY-MM-DD format, e.g. 1985-06-15
`time`	Yes	Birth time in 24h HH:MM:SS format, e.g. 10:30:00
`place`	No	Optional birth-place name (cosmetic only).
`gender`	No	Optional. A few classical yogas are defined by gender -- Mahabhagya's rule is gender x day/night x odd/even signs. Supply it when known; when omitted those yogas are left out of the result rather than computed against an assumed gender.
`latitude`	Yes	Birth-place latitude in decimal degrees, e.g. 13.0827
`timezone`	Yes	Timezone offset from UTC in hours, e.g. 5.5 for IST
`longitude`	Yes	Birth-place longitude in decimal degrees, e.g. 80.2707

Schema Changelog

Changes observed during successful MCP inspections.

Changed1 schema field changedAug 26, 2026

addedInput schema / properties / gender

Added value: +{
+  "description": "Optional. A few classical yogas are defined by gender -- Mahabhagya's rule is gender x day/night x odd/even signs. Supply it when known; when omitted those yogas are left out of the result rather than computed against an assumed gender.",
+  "enum": [
+    "male",
+    "female"
+  ],
+  "type": "string"
+}

First observedAug 10, 2026

TDQS

A4.2/5.0

Behavior4/5

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

Annotations already declare readOnly, idempotent, and non-destructive. The description goes beyond them by clarifying that results are raw derived lagnas with no interpretation, and that each lagna maps to a sign and longitude. There is no contradiction with 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.

Conciseness5/5

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

Three short, purposeful sentences: the main action, the output shape, and the data-only boundary. The list of lagna names is long but necessary to define the tool's scope precisely.

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

Completeness4/5

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

For a simple read-only data retrieval tool, the description is largely complete: inputs are fully documented in the schema, and the output shape plus no-interpretation contract are described. Because there is no output schema, slightly more detail about exact sign representation or response structure would fully close the gap.

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

Parameters3/5

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

The input schema has 100% description coverage for all 7 parameters, so the baseline is 3. The description adds no parameter-level guidance, but the schema already carries that burden effectively.

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 states a specific verb and resource: 'Return the special (derived) lagnas of the chart.' It also enumerates the exact lagnas included, which distinguishes it from sibling tools like get_sahams or get_arudha_padas that might otherwise sound similar.

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

Usage Guidelines4/5

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

It provides clear usage context by stating 'Data only — no interpretation is added,' telling an agent this endpoint returns raw data and is not for interpretive readings. It does not name a sibling alternative, so it stops just short of explicit alternative routing.

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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