Vedic Astrology and Kundli MCP Server by RoxyAPI

Ecliptic Crossings - When planets cross the ecliptic plane

post_vedic_astrology_ecliptic_crossings

Read-only

Find all ecliptic plane crossings for visible planets during a given year. An ecliptic crossing occurs when a planetary celestial latitude passes through 0 degrees, crossing from one side of the ecliptic to the other. Ascending crossings (south to north) correspond to the ascending node, descending crossings (north to south) to the descending node. Moon crosses ~2 times per month, outer planets cross less frequently. Returns exact date, time, direction, longitude and zodiac sign in the requested coordinateSystem, sidereal by default. Ecliptic crossing API, planetary node crossing, ascending descending node ephemeris.

Input Schema

TableJSON Schema

Name	Required	Description	Default
`lang`	No	Response language (BCP 47). Supported: en, tr, de, es, hi, pt, fr, ru, zh-Hans, zh-Hant. Defaults to en. Coverage varies by domain, and a field with no translation in the requested language returns English.	en
`year`	Yes	Year to scan for ecliptic crossings (1551 to 2649).
`compact`	No	Set true for the same data in a compact shape: arrays of same-shaped objects arrive columnar as {"__cols":[names],"__rows":[[values]]}. Lossless, typically 40 to 52 percent fewer tokens.
`timezone`	No	Timezone: an IANA name (e.g. "America/New_York", "Europe/London", or `cities[0].timezone` from /location/search) or decimal hours from UTC (e.g. -5 for EST, 5.5 for IST). An IANA name is resolved once, at the start of the window, and that offset applies to every time in the response. Output times are converted to this timezone. Defaults to 0 (UTC).
`coordinateSystem`	No	Coordinate system for longitude output. "sidereal" (Nirayana) uses Lahiri ayanamsa, the standard for Vedic astrology. "tropical" (Sayana) uses raw ecliptic longitude matching Western astrology. Defaults to "sidereal".	sidereal

Output Schema

TableJSON Schema

Name	Required	Description	Default
`year`	Yes
`events`	Yes
`timezone`	Yes

Schema Changelog

Changes observed during successful MCP inspections.

Changed3 schema fields changedSep 30, 2026

changedInput schema / properties / year / description

Previous value: -"Year to scan for ecliptic crossings (1900-2100)."New value: +"Year to scan for ecliptic crossings (1551 to 2649)."

changedInput schema / properties / year / maximum
```
Previous value: -2100New value: +2649
```
changedInput schema / properties / year / minimum
```
Previous value: -1900New value: +1551
```

Changed3 schema fields changedSep 23, 2026

addedInput schema / properties / lang

Added value: +{
+  "default": "en",
+  "description": "Response language (BCP 47). Supported: en, tr, de, es, hi, pt, fr, ru, zh-Hans, zh-Hant. Defaults to en. Coverage varies by domain, and a field with no translation in the requested language returns English.",
+  "enum": [
+    "en",
+    "tr",
+    "de",
+    "es",
+    "hi",
+    "pt",
+    "fr",
+    "ru",
+    "zh-Hans",
+    "zh-Hant"
+  ],
+  "example": "en",
+  "type": "string"
+}

addedOutput schema / properties / events / items / properties / planetLocalized
```
Added value: +{
+  "type": "string"
+}
```
addedOutput schema / properties / events / items / properties / signLocalized
```
Added value: +{
+  "type": "string"
+}
```

Changed1 schema field changedSep 23, 2026

changedInput schema / properties / timezone / description

Previous value: -"Timezone offset from UTC in hours. Output times are converted to this timezone. Defaults to 0 (UTC)."New value: +"Timezone: an IANA name (e.g. \"America/New_York\", \"Europe/London\", or `cities[0].timezone` from /location/search) or decimal hours from UTC (e.g. -5 for EST, 5.5 for IST). An IANA name is resolved once, at the start of the window, and that offset applies to every time in the response. Output times are converted to this timezone. Defaults to 0 (UTC)."

Changed1 schema field changedSep 20, 2026

changedOutput schema / (root)

Previous value: -nullNew value: +{
+  "properties": {
+    "events": {
+      "items": {
+        "properties": {
+          "date": {
+            "type": "string"
+          },
+          "datetime": {
+            "type": "string"
+          },
+          "direction": {
+            "enum": [
+              "ascending",
+              "descending"
+            ],
+            "type": "string"
+          },
+          "longitude": {
+            "type": "number"
+          },
+          "planet": {
+            "type": "string"
+          },
+          "sign": {
+            "type": "string"
+          },
+          "time": {
+            "type": "string"
+          }
+        },
+        "required": [
+          "planet",
+          "date",
+          "time",
+          "datetime",
+          "direction",
+          "longitude",
+          "sign"
+        ],
+        "type": "object"
+      },
+      "type": "array"
+    },
+    "timezone": {
+      "type": "number"
+    },
+    "year": {
+      "type": "number"
+    }
+  },
+  "required": [
+    "year",
+    "timezone",
+    "events"
+  ],
+  "type": "object"
+}

Changed1 schema field changedSep 4, 2026

changedInput schema / properties / coordinateSystem / description

Previous value: -"Coordinate system for longitude output. \"sidereal\" (Nirayana) uses Lahiri ayanamsa - standard for Vedic astrology. \"tropical\" (Sayana) uses raw ecliptic longitude matching Western astrology. Defaults to \"sidereal\"."New value: +"Coordinate system for longitude output. \"sidereal\" (Nirayana) uses Lahiri ayanamsa, the standard for Vedic astrology. \"tropical\" (Sayana) uses raw ecliptic longitude matching Western astrology. Defaults to \"sidereal\"."

Changed2 schema fields changedAug 17, 2026

addedInput schema / examples

Added value: +[
+  {
+    "year": 2026
+  }
+]

changedInput schema / properties / compact / description

Previous value: -"Set true to receive the exact same data in a token-optimized shape that is cheaper for you to read: whitespace is stripped and every array of same-shaped objects is encoded columnar as {\"__cols\":[field names],\"__rows\":[[values]]}, so each field name is sent once instead of once per row. Fully lossless (no field or value is dropped or changed) and typically 40 to 52 percent fewer tokens on large results. Prefer true whenever token or inference cost matters. Default false returns standard indented JSON."New value: +"Set true for the same data in a compact shape: arrays of same-shaped objects arrive columnar as {\"__cols\":[names],\"__rows\":[[values]]}. Lossless, typically 40 to 52 percent fewer tokens."

Changed1 schema field changedJul 22, 2026

changedInput schema / properties / compact / description

Previous value: -"Return the same data in a token-optimized compact shape (minified, with same-shaped arrays encoded columnar) to reduce LLM token cost. Lossless: no fields are dropped. Default false."New value: +"Set true to receive the exact same data in a token-optimized shape that is cheaper for you to read: whitespace is stripped and every array of same-shaped objects is encoded columnar as {\"__cols\":[field names],\"__rows\":[[values]]}, so each field name is sent once instead of once per row. Fully lossless (no field or value is dropped or changed) and typically 40 to 52 percent fewer tokens on large results. Prefer true whenever token or inference cost matters. Default false returns standard indented JSON."

Changed1 schema field changedJul 22, 2026

addedInput schema / properties / compact

Added value: +{
+  "default": false,
+  "description": "Return the same data in a token-optimized compact shape (minified, with same-shaped arrays encoded columnar) to reduce LLM token cost. Lossless: no fields are dropped. Default false.",
+  "type": "boolean"
+}

Changed1 schema field changedJul 12, 2026

changedInput schema / properties / timezone / anyOf

Previous value: -[
-  {
-    "maximum": 14,
-    "minimum": -14,
-    "type": "number"
-  },
-  {
-    "pattern": "^[A-Za-z_]+(?:\\/[A-Za-z0-9_+-]+){0,2}$",
-    "type": "string"
-  }
-]New value: +[
+  {
+    "maximum": 14,
+    "minimum": -14,
+    "type": "number"
+  },
+  {
+    "type": "string"
+  }
+]

First observedJul 8, 2026

TDQS

A3.8/5.0

Behavior4/5

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

Annotations already declare readOnlyHint=true and destructiveHint=false, so safety needs no restating. The description usefully adds domain behavior beyond that: the ascending/descending node mapping, crossing frequency, and the fact that results are returned in the requested coordinateSystem (sidereal default). It does not mention pagination limits or how many rows a busy year might return, but the added context is substantive.

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

Conciseness3/5

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

The opening is well front-loaded with purpose and a definition of the phenomenon, and the frequency sentence earns its place. However, the trailing phrase 'Ecliptic crossing API, planetary node crossing, ascending descending node ephemeris' is keyword stuffing that adds no selection or invocation value and should be cut.

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?

With an output schema present, return-field explanation is optional, yet the description still names date, time, direction, longitude, and sign, which is helpful. Combined with annotations covering the read-only profile and a fully documented schema, an agent has enough to invoke correctly; only alternative-tool routing is missing.

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?

Schema description coverage is 100%, so all five parameters (lang, year, compact, timezone, coordinateSystem) are already documented in the schema, including defaults, ranges, and formats. The description adds nothing about parameters beyond restating the coordinateSystem default, so the baseline 3 applies.

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?

States a specific verb and resource ('Find all ecliptic plane crossings for visible planets during a given year') and immediately defines the phenomenon so the agent knows exactly what event is being computed. This is clearly distinguishable from siblings like parallels, heliacal, and transit, which cover different astronomical events.

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 explains what a crossing is and gives frequency context (Moon ~2×/month, outer planets less often), which implicitly helps an agent judge relevance. However, it never states when to choose this over cousins such as post_vedic_astrology_parallels or post_vedic_astrology_transit, nor any prerequisites or exclusions.

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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