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astroway-mcp

astroway-mcp

Official
by astroway

Generate Natal Report (PDF or HTML)

astroway_reports_natal

Generate a Western tropical natal chart report as a PDF, HTML, or Markdown document with Sun/Moon/Ascendant, planets in houses, retrograde markers, house cusps, and major aspects.

Instructions

Render a Western tropical natal chart as a single-page A4 PDF (default) or live HTML (add ?format=html). Includes Big Three (Sun/Moon/ASC), full planets table with houses + retrograde, all 12 house cusps, and major aspects. Set whitelabel: true to apply the caller's branding overrides. depth: "extended" (10000 credits instead of 5000) adds the chart wheel and a chapter for each of Sun to Pluto, Chiron and the Ascendant in its sign, from edited texts in the 20 languages of /natal-texts; no AI at request time. Languages: uk (default) or en.

[Group: Reports] [Endpoint: POST /v1/reports/natal] [Required: chart] [Cost: 5,000 credits (Tier 7)] ⚠️ Premium — ~50% of free monthly budget. Confirm with user before invoking.

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": {
      "chart": "<chart>"
    },
    "name": "astroway_reports_natal"
  }
}

Input Schema

NameRequiredDescriptionDefault
toneNo
chartYesBirth data where the clock time may be unknown. Either pass time (HH:mm:ss), or set timeUnknown: true and omit it. In the second case the response carries planets and aspects but no houses, angles or sect.
depthNo`extended` (10000 credits) adds the chart wheel and a chapter for each of Sun to Pluto, Chiron and the Ascendant in its sign, from edited texts with no AI at request time. Available in the 20 languages of `/v1/natal-texts`.
enrichNo
formatNo`pdf` (default) stores a PDF and answers with its `url`. `html` returns one self-contained `text/html` document, `markdown` returns `text/markdown` with the same sections and tables; neither is stored. Same price in every format.
lengthNo
languageNo
whitelabelNo

Output Schema

NameRequiredDescriptionDefault
urlNo
expires_atNo
page_countNo
byte_lengthNo
duration_msNo
storage_keyNo

Schema Changelog

Changes observed during successful MCP inspections.

  1. Changed2 schema fields changedv1.6.2
    • changedInput schema / properties / chart / 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": {
      -      "latitude": {
      -        "description": "Birth latitude. Required here: the whole document is computed from it.",
      -        "maximum": 90,
      -        "minimum": -90,
      -        "type": "number"
      -      },
      -      "longitude": {
      -        "description": "Birth longitude. Required here: the whole document is computed from it.",
      -        "maximum": 180,
      -        "minimum": -180,
      -        "type": "number"
      -      }
      -    },
      -    "type": "object"
      -  }
      -]New value: +[
      +  {
      +    "additionalProperties": {
      +      "anyOf": [
      +        {},
      +        {
      +          "type": "null"
      +        }
      +      ]
      +    },
      +    "description": "Birth data where the clock time may be unknown. Either pass time (HH:mm:ss), or set timeUnknown: true and omit it. In the second case the response carries planets and aspects but no houses, angles or sect.",
      +    "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"
      +      },
      +      "timeUnknown": {
      +        "type": "boolean"
      +      },
      +      "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",
      +      "latitude",
      +      "longitude"
      +    ],
      +    "type": "object"
      +  },
      +  {
      +    "additionalProperties": {
      +      "anyOf": [
      +        {},
      +        {
      +          "type": "null"
      +        }
      +      ]
      +    },
      +    "properties": {
      +      "latitude": {
      +        "description": "Birth latitude. Required here: the whole document is computed from it.",
      +        "maximum": 90,
      +        "minimum": -90,
      +        "type": "number"
      +      },
      +      "longitude": {
      +        "description": "Birth longitude. Required here: the whole document is computed from it.",
      +        "maximum": 180,
      +        "minimum": -180,
      +        "type": "number"
      +      }
      +    },
      +    "type": "object"
      +  }
      +]
    • changedInput schema / properties / chart / description
      Previous value: -"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."New value: +"Birth data where the clock time may be unknown. Either pass time (HH:mm:ss), or set timeUnknown: true and omit it. In the second case the response carries planets and aspects but no houses, angles or sect."
  2. Changed3 schema fields changedv1.6.1
    • changedInput schema / properties / chart / 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": {
      -        "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": {
      -      "latitude": {
      -        "description": "Birth latitude. Required here: the whole document is computed from it.",
      -        "maximum": 90,
      -        "minimum": -90,
      -        "type": "number"
      -      },
      -      "longitude": {
      -        "description": "Birth longitude. Required here: the whole document is computed from it.",
      -        "maximum": 180,
      -        "minimum": -180,
      -        "type": "number"
      -      }
      -    },
      -    "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": {
      +      "latitude": {
      +        "description": "Birth latitude. Required here: the whole document is computed from it.",
      +        "maximum": 90,
      +        "minimum": -90,
      +        "type": "number"
      +      },
      +      "longitude": {
      +        "description": "Birth longitude. Required here: the whole document is computed from it.",
      +        "maximum": 180,
      +        "minimum": -180,
      +        "type": "number"
      +      }
      +    },
      +    "type": "object"
      +  }
      +]
    • changedInput schema / properties / chart / description
      Previous value: -"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."New value: +"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."
    • addedInput schema / properties / format
      Added value: +{
      +  "description": "`pdf` (default) stores a PDF and answers with its `url`. `html` returns one self-contained `text/html` document, `markdown` returns `text/markdown` with the same sections and tables; neither is stored. Same price in every format.",
      +  "enum": [
      +    "pdf",
      +    "html",
      +    "markdown"
      +  ],
      +  "type": "string"
      +}
  3. Addedv1.6.0

TDQS

A3.7/5.0
Behavior4/5

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

Adds a lot beyond the annotations: the 5,000 credit price (~50% of free monthly budget), the 10,000 credit cost of extended depth, the requirement to confirm with the user, and the fact that PDF is stored and answered with a URL while html is returned inline and not stored. Slightly thin on idempotency/regeneration behavior, but the cost and storage traits are well disclosed.

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 dense paragraph that front-loads what is rendered and what it costs, with each clause carrying concrete information. It stays readable, though the `?format=html` phrasing and the language list add noise that conflicts with the schema.

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?

Output schema exists, so return shape need not be explained, and the description covers the high-stakes facts an agent needs before spending 5,000 credits. The gaps are the undocumented presentation parameters and the misleading uk/en language claim, which could cause a caller to drop supported locales.

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?

With only 38% schema description coverage the description must carry more, and it explains format, depth and whitelabel overrides reasonably. But it narrows language to 'uk (default) or en' while the schema enumerates 21 locales, and it describes format as a `?format=html` query switch rather than the `format` field with pdf/html/markdown, so tone, length and enrich get no explanation at all.

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?

Opens with a specific verb and resource: render a Western tropical natal chart as a single-page A4 PDF or live HTML, and enumerates the sections included (Big Three, planets table, house cusps, aspects). It never names a sibling, so the contrast with astroway_reports_ai_natal_narrative or astroway_reports_generate is only implied by 'no AI at request time'.

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?

Gives useful decision points for depth (standard vs extended with price delta) and for whitelabel branding, plus the premium-cost confirmation instruction. It does not state when to pick this deterministic report over the AI narrative siblings, nor any precondition beyond the required chart object.

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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