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AstroWay Astrology API (full catalogue)

Firdaria

astroway_prognostics_firdaria
Read-onlyIdempotent

Calculate Firdaria planetary periods: the traditional Persian time-lord system based on sect and planet order.

[Group: Prognostics] [Endpoint: POST /v1/firdaria] [Cost: 20 credits (Tier 2)]

Tool call template

Replace each placeholder with a value matching the input schema. Only required parameters are included; add optional parameters as needed.

{
  "id": 1,
  "jsonrpc": "2.0",
  "method": "tools/call",
  "params": {
    "arguments": {
      "body": "<body>"
    },
    "name": "astroway_prognostics_firdaria"
  }
}

Input Schema

NameRequiredDescriptionDefault
bodyYesNatal chart plus the number of years of firdaria periods to return and the place of the nodes by night.
fieldsNoCompact mode: comma-separated dotted paths to keep, relative to `data`, e.g. "planets.name,planets.longitude,houses.cusp". Omit for the whole response.
precisionNoCompact mode: round fractional numbers to this many decimals. Longitudes carry 14 by default; 2 is finer than any chart is drawn.

Output Schema

NameRequiredDescriptionDefault
periodsNo

Schema Changelog

Changes observed during successful MCP inspections.

  1. Changed2 schema fields changed
    • changedInput schema / properties / body / allOf
      Previous value: -[
      -  {
      -    "additionalProperties": {
      -      "anyOf": [
      -        {},
      -        {
      -          "type": "null"
      -        }
      -      ]
      -    },
      -    "description": "Birth data for a single natal chart. Required: date (YYYY-MM-DD), time (HH:mm:ss), latitude and longitude in decimal degrees. The short forms lat, lon, lng and tz are rejected with 400 INVALID_FIELD; pass the full names. timezoneOffset is hours from UTC and defaults to 0, meaning UTC; send timezone instead (an IANA name such as Europe/Kyiv, or auto) and the offset for that date is worked out, summer time included. city is a display label only: nothing here geocodes it, so it never stands in for coordinates. houseSystem is a single house-system letter, P by default; a name such as \"Placidus\" is refused, and the case matters because I and i are two different Sunshine systems.",
      -    "properties": {
      -      "ayanamsa": {
      -        "description": "Sidereal school by name. Lahiri when omitted. Equivalent to ayanamsaId; send either.",
      -        "enum": [
      -          "fagan-bradley",
      -          "lahiri",
      -          "de-luce",
      -          "raman",
      -          "krishnamurti",
      -          "kp",
      -          "yukteshwar",
      -          "jn-bhasin",
      -          "true-citra",
      -          "djwhal-khul"
      -        ],
      -        "type": "string"
      -      },
      -      "ayanamsaId": {
      -        "type": [
      -          "number",
      -          "null"
      -        ]
      -      },
      -      "city": {
      -        "default": "",
      -        "type": "string"
      -      },
      -      "cosmogram": {
      -        "type": "boolean"
      -      },
      -      "date": {
      -        "pattern": "^\\d{4}-\\d{2}-\\d{2}$",
      -        "type": "string"
      -      },
      -      "houseSystem": {
      -        "default": "P",
      -        "enum": [
      -          "P",
      -          "K",
      -          "R",
      -          "C",
      -          "E",
      -          "W",
      -          "B",
      -          "M",
      -          "O",
      -          "A",
      -          "T",
      -          "V",
      -          "D",
      -          "F",
      -          "G",
      -          "H",
      -          "I",
      -          "i",
      -          "L",
      -          "N",
      -          "Q",
      -          "S",
      -          "U",
      -          "X",
      -          "Y"
      -        ],
      -        "type": "string"
      -      },
      -      "latitude": {
      -        "maximum": 90,
      -        "minimum": -90,
      -        "type": "number"
      -      },
      -      "longitude": {
      -        "maximum": 180,
      -        "minimum": -180,
      -        "type": "number"
      -      },
      -      "name": {
      -        "default": "",
      -        "type": "string"
      -      },
      -      "time": {
      -        "pattern": "^\\d{2}:\\d{2}(:\\d{2})?$",
      -        "type": "string"
      -      },
      -      "timezone": {
      -        "description": "IANA 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.",
      -        "type": "string"
      -      },
      -      "timezoneOffset": {
      -        "anyOf": [
      -          {
      -            "maximum": 14,
      -            "minimum": -14,
      -            "type": "number"
      -          },
      -          {
      -            "type": "null"
      -          }
      -        ],
      -        "default": 0,
      -        "description": "Hours 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."
      -      },
      -      "zodiacType": {
      -        "enum": [
      -          "tropical",
      -          "sidereal"
      -        ],
      -        "type": "string"
      -      }
      -    },
      -    "required": [
      -      "date",
      -      "time",
      -      "latitude",
      -      "longitude"
      -    ],
      -    "type": "object"
      -  },
      -  {
      -    "additionalProperties": {
      -      "anyOf": [
      -        {},
      -        {
      -          "type": "null"
      -        }
      -      ]
      -    },
      -    "properties": {
      -      "maxYears": {
      -        "exclusiveMinimum": 0,
      -        "maximum": 200,
      -        "type": "integer"
      -      }
      -    },
      -    "type": "object"
      -  }
      -]New value: +[
      +  {
      +    "additionalProperties": {
      +      "anyOf": [
      +        {},
      +        {
      +          "type": "null"
      +        }
      +      ]
      +    },
      +    "description": "Birth data for a single natal chart. Required: date (YYYY-MM-DD), time (HH:mm:ss), latitude and longitude in decimal degrees. The short forms lat, lon, lng and tz are rejected with 400 INVALID_FIELD; pass the full names. timezoneOffset is hours from UTC and defaults to 0, meaning UTC; send timezone instead (an IANA name such as Europe/Kyiv, or auto) and the offset for that date is worked out, summer time included. city is a display label only: nothing here geocodes it, so it never stands in for coordinates. houseSystem is a single house-system letter, P by default; a name such as \"Placidus\" is refused, and the case matters because I and i are two different Sunshine systems.",
      +    "properties": {
      +      "ayanamsa": {
      +        "description": "Sidereal school by name. Lahiri when omitted. Equivalent to ayanamsaId; send either.",
      +        "enum": [
      +          "fagan-bradley",
      +          "lahiri",
      +          "de-luce",
      +          "raman",
      +          "krishnamurti",
      +          "kp",
      +          "yukteshwar",
      +          "jn-bhasin",
      +          "true-citra",
      +          "djwhal-khul"
      +        ],
      +        "type": "string"
      +      },
      +      "ayanamsaId": {
      +        "type": [
      +          "number",
      +          "null"
      +        ]
      +      },
      +      "city": {
      +        "default": "",
      +        "type": "string"
      +      },
      +      "cosmogram": {
      +        "type": "boolean"
      +      },
      +      "date": {
      +        "pattern": "^\\d{4}-\\d{2}-\\d{2}$",
      +        "type": "string"
      +      },
      +      "houseSystem": {
      +        "default": "P",
      +        "enum": [
      +          "P",
      +          "K",
      +          "R",
      +          "C",
      +          "E",
      +          "W",
      +          "B",
      +          "M",
      +          "O",
      +          "A",
      +          "T",
      +          "V",
      +          "D",
      +          "F",
      +          "G",
      +          "H",
      +          "I",
      +          "i",
      +          "L",
      +          "N",
      +          "Q",
      +          "S",
      +          "U",
      +          "X",
      +          "Y"
      +        ],
      +        "type": "string"
      +      },
      +      "latitude": {
      +        "maximum": 90,
      +        "minimum": -90,
      +        "type": "number"
      +      },
      +      "longitude": {
      +        "maximum": 180,
      +        "minimum": -180,
      +        "type": "number"
      +      },
      +      "name": {
      +        "default": "",
      +        "type": "string"
      +      },
      +      "time": {
      +        "pattern": "^\\d{2}:\\d{2}(:\\d{2})?$",
      +        "type": "string"
      +      },
      +      "timezone": {
      +        "description": "IANA 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.",
      +        "type": "string"
      +      },
      +      "timezoneOffset": {
      +        "anyOf": [
      +          {
      +            "maximum": 14,
      +            "minimum": -14,
      +            "type": "number"
      +          },
      +          {
      +            "type": "null"
      +          }
      +        ],
      +        "default": 0,
      +        "description": "Hours 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."
      +      },
      +      "zodiacType": {
      +        "enum": [
      +          "tropical",
      +          "sidereal"
      +        ],
      +        "type": "string"
      +      }
      +    },
      +    "required": [
      +      "date",
      +      "time",
      +      "latitude",
      +      "longitude"
      +    ],
      +    "type": "object"
      +  },
      +  {
      +    "additionalProperties": {
      +      "anyOf": [
      +        {},
      +        {
      +          "type": "null"
      +        }
      +      ]
      +    },
      +    "properties": {
      +      "maxYears": {
      +        "exclusiveMinimum": 0,
      +        "maximum": 200,
      +        "type": "integer"
      +      },
      +      "nodes": {
      +        "description": "Where the nodes fall in a night birth: after Mars (default) or at the end of the series, as in Bonatti. Day births always end with the nodes.",
      +        "enum": [
      +          "after-mars",
      +          "end"
      +        ],
      +        "type": "string"
      +      }
      +    },
      +    "type": "object"
      +  }
      +]
    • changedInput schema / properties / body / description
      Previous value: -"Natal chart plus the number of years of firdaria periods to return."New value: +"Natal chart plus the number of years of firdaria periods to return and the place of the nodes by night."
  2. Changed2 schema fields changed
    • changedInput schema / properties / body / allOf
      Previous value: -[
      -  {
      -    "additionalProperties": {
      -      "anyOf": [
      -        {},
      -        {
      -          "type": "null"
      -        }
      -      ]
      -    },
      -    "description": "Birth data for a single natal chart. Required: date (YYYY-MM-DD), time (HH:mm:ss), latitude and longitude in decimal degrees. The short forms lat, lon, lng and tz are rejected with 400 INVALID_FIELD; pass the full names. timezoneOffset is hours from UTC and defaults to 0, meaning UTC; send timezone instead (an IANA name such as Europe/Kyiv, or auto) and the offset for that date is worked out, summer time included. city is a display label only: nothing here geocodes it, so it never stands in for coordinates. houseSystem is a single house-system letter, P by default; a name such as \"Placidus\" is refused, and the case matters because I and i are two different Sunshine systems.",
      -    "properties": {
      -      "ayanamsa": {
      -        "description": "Sidereal school by name. Lahiri when omitted. Equivalent to ayanamsaId; send either.",
      -        "enum": [
      -          "fagan-bradley",
      -          "lahiri",
      -          "de-luce",
      -          "raman",
      -          "krishnamurti",
      -          "kp",
      -          "yukteshwar",
      -          "jn-bhasin",
      -          "true-citra",
      -          "djwhal-khul"
      -        ],
      -        "type": "string"
      -      },
      -      "ayanamsaId": {
      -        "anyOf": [
      -          {
      -            "type": "number"
      -          },
      -          {
      -            "type": "null"
      -          }
      -        ]
      -      },
      -      "city": {
      -        "default": "",
      -        "type": "string"
      -      },
      -      "cosmogram": {
      -        "type": "boolean"
      -      },
      -      "date": {
      -        "pattern": "^\\d{4}-\\d{2}-\\d{2}$",
      -        "type": "string"
      -      },
      -      "houseSystem": {
      -        "default": "P",
      -        "enum": [
      -          "P",
      -          "K",
      -          "R",
      -          "C",
      -          "E",
      -          "W",
      -          "B",
      -          "M",
      -          "O",
      -          "A",
      -          "T",
      -          "V",
      -          "D",
      -          "F",
      -          "G",
      -          "H",
      -          "I",
      -          "i",
      -          "L",
      -          "N",
      -          "Q",
      -          "S",
      -          "U",
      -          "X",
      -          "Y"
      -        ],
      -        "type": "string"
      -      },
      -      "latitude": {
      -        "maximum": 90,
      -        "minimum": -90,
      -        "type": "number"
      -      },
      -      "longitude": {
      -        "maximum": 180,
      -        "minimum": -180,
      -        "type": "number"
      -      },
      -      "name": {
      -        "default": "",
      -        "type": "string"
      -      },
      -      "time": {
      -        "pattern": "^\\d{2}:\\d{2}(:\\d{2})?$",
      -        "type": "string"
      -      },
      -      "timezone": {
      -        "description": "IANA 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.",
      -        "type": "string"
      -      },
      -      "timezoneOffset": {
      -        "anyOf": [
      -          {
      -            "maximum": 14,
      -            "minimum": -14,
      -            "type": "number"
      -          },
      -          {
      -            "type": "null"
      -          }
      -        ],
      -        "default": 0,
      -        "description": "Hours 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."
      -      },
      -      "zodiacType": {
      -        "enum": [
      -          "tropical",
      -          "sidereal"
      -        ],
      -        "type": "string"
      -      }
      -    },
      -    "required": [
      -      "date",
      -      "time",
      -      "latitude",
      -      "longitude"
      -    ],
      -    "type": "object"
      -  },
      -  {
      -    "additionalProperties": {
      -      "anyOf": [
      -        {},
      -        {
      -          "type": "null"
      -        }
      -      ]
      -    },
      -    "properties": {
      -      "maxYears": {
      -        "exclusiveMinimum": 0,
      -        "maximum": 200,
      -        "type": "integer"
      -      }
      -    },
      -    "type": "object"
      -  }
      -]New value: +[
      +  {
      +    "additionalProperties": {
      +      "anyOf": [
      +        {},
      +        {
      +          "type": "null"
      +        }
      +      ]
      +    },
      +    "description": "Birth data for a single natal chart. Required: date (YYYY-MM-DD), time (HH:mm:ss), latitude and longitude in decimal degrees. The short forms lat, lon, lng and tz are rejected with 400 INVALID_FIELD; pass the full names. timezoneOffset is hours from UTC and defaults to 0, meaning UTC; send timezone instead (an IANA name such as Europe/Kyiv, or auto) and the offset for that date is worked out, summer time included. city is a display label only: nothing here geocodes it, so it never stands in for coordinates. houseSystem is a single house-system letter, P by default; a name such as \"Placidus\" is refused, and the case matters because I and i are two different Sunshine systems.",
      +    "properties": {
      +      "ayanamsa": {
      +        "description": "Sidereal school by name. Lahiri when omitted. Equivalent to ayanamsaId; send either.",
      +        "enum": [
      +          "fagan-bradley",
      +          "lahiri",
      +          "de-luce",
      +          "raman",
      +          "krishnamurti",
      +          "kp",
      +          "yukteshwar",
      +          "jn-bhasin",
      +          "true-citra",
      +          "djwhal-khul"
      +        ],
      +        "type": "string"
      +      },
      +      "ayanamsaId": {
      +        "type": [
      +          "number",
      +          "null"
      +        ]
      +      },
      +      "city": {
      +        "default": "",
      +        "type": "string"
      +      },
      +      "cosmogram": {
      +        "type": "boolean"
      +      },
      +      "date": {
      +        "pattern": "^\\d{4}-\\d{2}-\\d{2}$",
      +        "type": "string"
      +      },
      +      "houseSystem": {
      +        "default": "P",
      +        "enum": [
      +          "P",
      +          "K",
      +          "R",
      +          "C",
      +          "E",
      +          "W",
      +          "B",
      +          "M",
      +          "O",
      +          "A",
      +          "T",
      +          "V",
      +          "D",
      +          "F",
      +          "G",
      +          "H",
      +          "I",
      +          "i",
      +          "L",
      +          "N",
      +          "Q",
      +          "S",
      +          "U",
      +          "X",
      +          "Y"
      +        ],
      +        "type": "string"
      +      },
      +      "latitude": {
      +        "maximum": 90,
      +        "minimum": -90,
      +        "type": "number"
      +      },
      +      "longitude": {
      +        "maximum": 180,
      +        "minimum": -180,
      +        "type": "number"
      +      },
      +      "name": {
      +        "default": "",
      +        "type": "string"
      +      },
      +      "time": {
      +        "pattern": "^\\d{2}:\\d{2}(:\\d{2})?$",
      +        "type": "string"
      +      },
      +      "timezone": {
      +        "description": "IANA 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.",
      +        "type": "string"
      +      },
      +      "timezoneOffset": {
      +        "anyOf": [
      +          {
      +            "maximum": 14,
      +            "minimum": -14,
      +            "type": "number"
      +          },
      +          {
      +            "type": "null"
      +          }
      +        ],
      +        "default": 0,
      +        "description": "Hours 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."
      +      },
      +      "zodiacType": {
      +        "enum": [
      +          "tropical",
      +          "sidereal"
      +        ],
      +        "type": "string"
      +      }
      +    },
      +    "required": [
      +      "date",
      +      "time",
      +      "latitude",
      +      "longitude"
      +    ],
      +    "type": "object"
      +  },
      +  {
      +    "additionalProperties": {
      +      "anyOf": [
      +        {},
      +        {
      +          "type": "null"
      +        }
      +      ]
      +    },
      +    "properties": {
      +      "maxYears": {
      +        "exclusiveMinimum": 0,
      +        "maximum": 200,
      +        "type": "integer"
      +      }
      +    },
      +    "type": "object"
      +  }
      +]
    • changedOutput schema / properties / periods / anyOf
      Previous value: -[
      -  {
      -    "items": {
      -      "anyOf": [
      -        {
      -          "additionalProperties": {},
      -          "properties": {
      -            "endDate": {
      -              "anyOf": [
      -                {
      -                  "type": "string"
      -                },
      -                {
      -                  "type": "null"
      -                }
      -              ]
      -            },
      -            "isActive": {
      -              "anyOf": [
      -                {
      -                  "type": "boolean"
      -                },
      -                {
      -                  "type": "null"
      -                }
      -              ]
      -            },
      -            "planet": {
      -              "anyOf": [
      -                {
      -                  "type": "string"
      -                },
      -                {
      -                  "type": "null"
      -                }
      -              ]
      -            },
      -            "startDate": {
      -              "anyOf": [
      -                {
      -                  "type": "string"
      -                },
      -                {
      -                  "type": "null"
      -                }
      -              ]
      -            },
      -            "subPlanet": {
      -              "anyOf": [
      -                {
      -                  "type": "string"
      -                },
      -                {
      -                  "type": "null"
      -                }
      -              ]
      -            }
      -          },
      -          "type": "object"
      -        },
      -        {
      -          "type": "null"
      -        }
      -      ]
      -    },
      -    "type": "array"
      -  },
      -  {
      -    "type": "null"
      -  }
      -]New value: +[
      +  {
      +    "items": {
      +      "anyOf": [
      +        {
      +          "additionalProperties": {},
      +          "properties": {
      +            "endDate": {
      +              "type": [
      +                "string",
      +                "null"
      +              ]
      +            },
      +            "isActive": {
      +              "type": [
      +                "boolean",
      +                "null"
      +              ]
      +            },
      +            "planet": {
      +              "type": [
      +                "string",
      +                "null"
      +              ]
      +            },
      +            "startDate": {
      +              "type": [
      +                "string",
      +                "null"
      +              ]
      +            },
      +            "subPlanet": {
      +              "type": [
      +                "string",
      +                "null"
      +              ]
      +            }
      +          },
      +          "type": "object"
      +        },
      +        {
      +          "type": "null"
      +        }
      +      ]
      +    },
      +    "type": "array"
      +  },
      +  {
      +    "type": "null"
      +  }
      +]
  3. Changed1 schema field changed
    • changedInput schema / properties / body / allOf
      Previous value: -[
      -  {
      -    "additionalProperties": {
      -      "anyOf": [
      -        {},
      -        {
      -          "type": "null"
      -        }
      -      ]
      -    },
      -    "description": "Birth data for a single natal chart. Required: date (YYYY-MM-DD), time (HH:mm:ss), latitude and longitude in decimal degrees. The short forms lat, lon, lng and tz are rejected with 400 INVALID_FIELD; pass the full names. timezoneOffset is hours from UTC and defaults to 0, meaning UTC; send timezone instead (an IANA name such as Europe/Kyiv, or auto) and the offset for that date is worked out, summer time included. city is a display label only: nothing here geocodes it, so it never stands in for coordinates. houseSystem is a single Swiss Ephemeris letter, P by default; a name such as \"Placidus\" is refused, and the case matters because I and i are two different Sunshine systems.",
      -    "properties": {
      -      "ayanamsa": {
      -        "description": "Sidereal school by name. Lahiri when omitted. Equivalent to ayanamsaId; send either.",
      -        "enum": [
      -          "fagan-bradley",
      -          "lahiri",
      -          "de-luce",
      -          "raman",
      -          "krishnamurti",
      -          "kp",
      -          "yukteshwar",
      -          "jn-bhasin",
      -          "true-citra",
      -          "djwhal-khul"
      -        ],
      -        "type": "string"
      -      },
      -      "ayanamsaId": {
      -        "anyOf": [
      -          {
      -            "type": "number"
      -          },
      -          {
      -            "type": "null"
      -          }
      -        ]
      -      },
      -      "city": {
      -        "default": "",
      -        "type": "string"
      -      },
      -      "cosmogram": {
      -        "type": "boolean"
      -      },
      -      "date": {
      -        "pattern": "^\\d{4}-\\d{2}-\\d{2}$",
      -        "type": "string"
      -      },
      -      "houseSystem": {
      -        "default": "P",
      -        "enum": [
      -          "P",
      -          "K",
      -          "R",
      -          "C",
      -          "E",
      -          "W",
      -          "B",
      -          "M",
      -          "O",
      -          "A",
      -          "T",
      -          "V",
      -          "D",
      -          "F",
      -          "G",
      -          "H",
      -          "I",
      -          "i",
      -          "L",
      -          "N",
      -          "Q",
      -          "S",
      -          "U",
      -          "X",
      -          "Y"
      -        ],
      -        "type": "string"
      -      },
      -      "latitude": {
      -        "maximum": 90,
      -        "minimum": -90,
      -        "type": "number"
      -      },
      -      "longitude": {
      -        "maximum": 180,
      -        "minimum": -180,
      -        "type": "number"
      -      },
      -      "name": {
      -        "default": "",
      -        "type": "string"
      -      },
      -      "time": {
      -        "pattern": "^\\d{2}:\\d{2}(:\\d{2})?$",
      -        "type": "string"
      -      },
      -      "timezone": {
      -        "description": "IANA 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.",
      -        "type": "string"
      -      },
      -      "timezoneOffset": {
      -        "anyOf": [
      -          {
      -            "maximum": 14,
      -            "minimum": -14,
      -            "type": "number"
      -          },
      -          {
      -            "type": "null"
      -          }
      -        ],
      -        "default": 0,
      -        "description": "Hours 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."
      -      },
      -      "zodiacType": {
      -        "enum": [
      -          "tropical",
      -          "sidereal"
      -        ],
      -        "type": "string"
      -      }
      -    },
      -    "required": [
      -      "date",
      -      "time",
      -      "latitude",
      -      "longitude"
      -    ],
      -    "type": "object"
      -  },
      -  {
      -    "additionalProperties": {
      -      "anyOf": [
      -        {},
      -        {
      -          "type": "null"
      -        }
      -      ]
      -    },
      -    "properties": {
      -      "maxYears": {
      -        "exclusiveMinimum": 0,
      -        "maximum": 200,
      -        "type": "integer"
      -      }
      -    },
      -    "type": "object"
      -  }
      -]New value: +[
      +  {
      +    "additionalProperties": {
      +      "anyOf": [
      +        {},
      +        {
      +          "type": "null"
      +        }
      +      ]
      +    },
      +    "description": "Birth data for a single natal chart. Required: date (YYYY-MM-DD), time (HH:mm:ss), latitude and longitude in decimal degrees. The short forms lat, lon, lng and tz are rejected with 400 INVALID_FIELD; pass the full names. timezoneOffset is hours from UTC and defaults to 0, meaning UTC; send timezone instead (an IANA name such as Europe/Kyiv, or auto) and the offset for that date is worked out, summer time included. city is a display label only: nothing here geocodes it, so it never stands in for coordinates. houseSystem is a single house-system letter, P by default; a name such as \"Placidus\" is refused, and the case matters because I and i are two different Sunshine systems.",
      +    "properties": {
      +      "ayanamsa": {
      +        "description": "Sidereal school by name. Lahiri when omitted. Equivalent to ayanamsaId; send either.",
      +        "enum": [
      +          "fagan-bradley",
      +          "lahiri",
      +          "de-luce",
      +          "raman",
      +          "krishnamurti",
      +          "kp",
      +          "yukteshwar",
      +          "jn-bhasin",
      +          "true-citra",
      +          "djwhal-khul"
      +        ],
      +        "type": "string"
      +      },
      +      "ayanamsaId": {
      +        "anyOf": [
      +          {
      +            "type": "number"
      +          },
      +          {
      +            "type": "null"
      +          }
      +        ]
      +      },
      +      "city": {
      +        "default": "",
      +        "type": "string"
      +      },
      +      "cosmogram": {
      +        "type": "boolean"
      +      },
      +      "date": {
      +        "pattern": "^\\d{4}-\\d{2}-\\d{2}$",
      +        "type": "string"
      +      },
      +      "houseSystem": {
      +        "default": "P",
      +        "enum": [
      +          "P",
      +          "K",
      +          "R",
      +          "C",
      +          "E",
      +          "W",
      +          "B",
      +          "M",
      +          "O",
      +          "A",
      +          "T",
      +          "V",
      +          "D",
      +          "F",
      +          "G",
      +          "H",
      +          "I",
      +          "i",
      +          "L",
      +          "N",
      +          "Q",
      +          "S",
      +          "U",
      +          "X",
      +          "Y"
      +        ],
      +        "type": "string"
      +      },
      +      "latitude": {
      +        "maximum": 90,
      +        "minimum": -90,
      +        "type": "number"
      +      },
      +      "longitude": {
      +        "maximum": 180,
      +        "minimum": -180,
      +        "type": "number"
      +      },
      +      "name": {
      +        "default": "",
      +        "type": "string"
      +      },
      +      "time": {
      +        "pattern": "^\\d{2}:\\d{2}(:\\d{2})?$",
      +        "type": "string"
      +      },
      +      "timezone": {
      +        "description": "IANA 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.",
      +        "type": "string"
      +      },
      +      "timezoneOffset": {
      +        "anyOf": [
      +          {
      +            "maximum": 14,
      +            "minimum": -14,
      +            "type": "number"
      +          },
      +          {
      +            "type": "null"
      +          }
      +        ],
      +        "default": 0,
      +        "description": "Hours 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."
      +      },
      +      "zodiacType": {
      +        "enum": [
      +          "tropical",
      +          "sidereal"
      +        ],
      +        "type": "string"
      +      }
      +    },
      +    "required": [
      +      "date",
      +      "time",
      +      "latitude",
      +      "longitude"
      +    ],
      +    "type": "object"
      +  },
      +  {
      +    "additionalProperties": {
      +      "anyOf": [
      +        {},
      +        {
      +          "type": "null"
      +        }
      +      ]
      +    },
      +    "properties": {
      +      "maxYears": {
      +        "exclusiveMinimum": 0,
      +        "maximum": 200,
      +        "type": "integer"
      +      }
      +    },
      +    "type": "object"
      +  }
      +]
  4. First observed

TDQS

B3.2/5.0
Behavior3/5

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

Annotations already declare readOnly, idempotent, non-destructive and closed-world behavior, so the safety profile is covered. The description adds useful operational context the annotations do not: the POST /v1/firdaria endpoint and a concrete cost of 20 credits (Tier 2). It does not, however, say anything about how the periods are structured in the response or any limits on the computation.

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?

A single front-loaded sentence states the operation, followed by a compact metadata block for group, endpoint and cost. Nothing is padded, though the metadata lines are boilerplate rather than explanatory content.

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 a rich input schema, a present output schema and full annotation coverage, the description only needs to establish the concept and operational cost, which it does. The remaining gap is conceptual: an agent gets no sense of how firdaria output differs from sibling prognostics techniques, but nothing needed to invoke it correctly 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%, and the nested birth-data and options objects (nodes, maxYears, timezone handling, houseSystem letters) are documented thoroughly in the schema itself. The description adds no parameter-level meaning beyond that, so the baseline of 3 applies.

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?

The description names a specific verb and resource ('Calculate Firdaria planetary periods') and adds a gloss identifying it as the traditional Persian time-lord system based on sect and planet order. An agent can tell what domain output to expect, though it does not explicitly contrast itself with sibling techniques such as profections or primary directions.

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

Usage Guidelines2/5

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

There is no when-to-use or when-not-to-use guidance, no prerequisites, and no reference to any alternative technique among the many prognostics siblings. The only implicit signal is the word 'traditional', which hints at a Hellenistic/Persian context but does not route the agent between firdaria and other time-lord methods.

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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