AstroWay Astrology API (full catalogue)

Family System Pattern

astroway_family_system_pattern

Read-onlyIdempotent

System-level family astrological signatures.

[Group: Family Astrology] [Endpoint: POST /v1/family/system-pattern] [Required: members] [Cost: 10 credits (Tier 1)]

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": {
      "members": "<members>"
    },
    "name": "astroway_family_system_pattern"
  }
}

Input Schema

Name	Required	Description
`fields`	No	Compact mode: comma-separated dotted paths to keep, relative to `data`, e.g. "planets.name,planets.longitude,houses.cusp". Omit for the whole response.
`members`	Yes
`precision`	No	Compact mode: round fractional numbers to this many decimals. Longitudes carry 14 by default; 2 is finer than any chart is drawn.

Output Schema

Name	Required	Description	Default
`source`	No
`members`	No
`disclaimer`	No
`systemSummary`	No
`excludedThemes`	No
`generationalShadow`	No
`luminaryGhostContacts`	No

Schema Changelog

Changes observed during successful MCP inspections.

Changed12 schema fields changedNov 7, 2026

changedInput schema / properties / members / items / 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": {
-      "role": {
-        "enum": [
-          "parent",
-          "child",
-          "grandparent",
-          "sibling",
-          "spouse"
-        ],
-        "type": "string"
-      }
-    },
-    "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": {
+      "role": {
+        "enum": [
+          "parent",
+          "child",
+          "grandparent",
+          "sibling",
+          "spouse"
+        ],
+        "type": "string"
+      }
+    },
+    "type": "object"
+  }
+]

removedOutput schema / properties / disclaimer / anyOf

Removed value: -[
-  {
-    "type": "string"
-  },
-  {
-    "type": "null"
-  }
-]

addedOutput schema / properties / disclaimer / type
```
Added value: +[
+  "string",
+  "null"
+]
```

changedOutput schema / properties / excludedThemes / anyOf

Previous value: -[
-  {
-    "items": {
-      "anyOf": [
-        {
-          "additionalProperties": {},
-          "properties": {
-            "memberIndex": {
-              "anyOf": [
-                {
-                  "type": "number"
-                },
-                {
-                  "type": "null"
-                }
-              ]
-            },
-            "name": {
-              "anyOf": [
-                {
-                  "type": "string"
-                },
-                {
-                  "type": "null"
-                }
-              ]
-            },
-            "role": {
-              "anyOf": [
-                {},
-                {
-                  "type": "null"
-                }
-              ]
-            },
-            "signatures": {
-              "anyOf": [
-                {
-                  "items": {
-                    "anyOf": [
-                      {
-                        "type": "string"
-                      },
-                      {
-                        "type": "null"
-                      }
-                    ]
-                  },
-                  "type": "array"
-                },
-                {
-                  "type": "null"
-                }
-              ]
-            }
-          },
-          "type": "object"
-        },
-        {
-          "type": "null"
-        }
-      ]
-    },
-    "type": "array"
-  },
-  {
-    "type": "null"
-  }
-]New value: +[
+  {
+    "items": {
+      "anyOf": [
+        {
+          "additionalProperties": {},
+          "properties": {
+            "memberIndex": {
+              "type": [
+                "number",
+                "null"
+              ]
+            },
+            "name": {
+              "type": [
+                "string",
+                "null"
+              ]
+            },
+            "role": {
+              "anyOf": [
+                {},
+                {
+                  "type": "null"
+                }
+              ]
+            },
+            "signatures": {
+              "anyOf": [
+                {
+                  "items": {
+                    "type": [
+                      "string",
+                      "null"
+                    ]
+                  },
+                  "type": "array"
+                },
+                {
+                  "type": "null"
+                }
+              ]
+            }
+          },
+          "type": "object"
+        },
+        {
+          "type": "null"
+        }
+      ]
+    },
+    "type": "array"
+  },
+  {
+    "type": "null"
+  }
+]

changedOutput schema / properties / generationalShadow / anyOf

Previous value: -[
-  {
-    "additionalProperties": {},
-    "properties": {
-      "dominantPlutoSign": {
-        "anyOf": [
-          {
-            "type": "string"
-          },
-          {
-            "type": "null"
-          }
-        ]
-      },
-      "perMember": {
-        "anyOf": [
-          {
-            "items": {
-              "anyOf": [
-                {
-                  "additionalProperties": {},
-                  "properties": {
-                    "idx": {
-                      "anyOf": [
-                        {
-                          "type": "number"
-                        },
-                        {
-                          "type": "null"
-                        }
-                      ]
-                    },
-                    "sign": {
-                      "anyOf": [
-                        {
-                          "type": "string"
-                        },
-                        {
-                          "type": "null"
-                        }
-                      ]
-                    }
-                  },
-                  "type": "object"
-                },
-                {
-                  "type": "null"
-                }
-              ]
-            },
-            "type": "array"
-          },
-          {
-            "type": "null"
-          }
-        ]
-      },
-      "summary": {
-        "anyOf": [
-          {
-            "type": "string"
-          },
-          {
-            "type": "null"
-          }
-        ]
-      }
-    },
-    "type": "object"
-  },
-  {
-    "type": "null"
-  }
-]New value: +[
+  {
+    "additionalProperties": {},
+    "properties": {
+      "dominantPlutoSign": {
+        "type": [
+          "string",
+          "null"
+        ]
+      },
+      "perMember": {
+        "anyOf": [
+          {
+            "items": {
+              "anyOf": [
+                {
+                  "additionalProperties": {},
+                  "properties": {
+                    "idx": {
+                      "type": [
+                        "number",
+                        "null"
+                      ]
+                    },
+                    "sign": {
+                      "type": [
+                        "string",
+                        "null"
+                      ]
+                    }
+                  },
+                  "type": "object"
+                },
+                {
+                  "type": "null"
+                }
+              ]
+            },
+            "type": "array"
+          },
+          {
+            "type": "null"
+          }
+        ]
+      },
+      "summary": {
+        "type": [
+          "string",
+          "null"
+        ]
+      }
+    },
+    "type": "object"
+  },
+  {
+    "type": "null"
+  }
+]

changedOutput schema / properties / luminaryGhostContacts / anyOf

Previous value: -[
-  {
-    "items": {
-      "anyOf": [
-        {
-          "additionalProperties": {},
-          "properties": {
-            "orb": {
-              "anyOf": [
-                {
-                  "type": "number"
-                },
-                {
-                  "type": "null"
-                }
-              ]
-            },
-            "pair": {
-              "anyOf": [
-                {
-                  "items": {
-                    "anyOf": [
-                      {
-                        "type": "number"
-                      },
-                      {
-                        "type": "null"
-                      }
-                    ]
-                  },
-                  "type": "array"
-                },
-                {
-                  "type": "null"
-                }
-              ]
-            },
-            "signature": {
-              "anyOf": [
-                {
-                  "type": "string"
-                },
-                {
-                  "type": "null"
-                }
-              ]
-            }
-          },
-          "type": "object"
-        },
-        {
-          "type": "null"
-        }
-      ]
-    },
-    "type": "array"
-  },
-  {
-    "type": "null"
-  }
-]New value: +[
+  {
+    "items": {
+      "anyOf": [
+        {
+          "additionalProperties": {},
+          "properties": {
+            "orb": {
+              "type": [
+                "number",
+                "null"
+              ]
+            },
+            "pair": {
+              "anyOf": [
+                {
+                  "items": {
+                    "type": [
+                      "number",
+                      "null"
+                    ]
+                  },
+                  "type": "array"
+                },
+                {
+                  "type": "null"
+                }
+              ]
+            },
+            "signature": {
+              "type": [
+                "string",
+                "null"
+              ]
+            }
+          },
+          "type": "object"
+        },
+        {
+          "type": "null"
+        }
+      ]
+    },
+    "type": "array"
+  },
+  {
+    "type": "null"
+  }
+]

removedOutput schema / properties / members / anyOf

Removed value: -[
-  {
-    "type": "number"
-  },
-  {
-    "type": "null"
-  }
-]

addedOutput schema / properties / members / type
```
Added value: +[
+  "number",
+  "null"
+]
```

removedOutput schema / properties / source / anyOf

Removed value: -[
-  {
-    "type": "string"
-  },
-  {
-    "type": "null"
-  }
-]

addedOutput schema / properties / source / type
```
Added value: +[
+  "string",
+  "null"
+]
```

removedOutput schema / properties / systemSummary / anyOf

Removed value: -[
-  {
-    "type": "string"
-  },
-  {
-    "type": "null"
-  }
-]

addedOutput schema / properties / systemSummary / type
```
Added value: +[
+  "string",
+  "null"
+]
```

Changed2 schema fields changedNov 6, 2026

changedInput schema / properties / members / items / 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": {
-      "role": {
-        "enum": [
-          "parent",
-          "child",
-          "grandparent",
-          "sibling",
-          "spouse"
-        ],
-        "type": "string"
-      }
-    },
-    "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": {
+      "role": {
+        "enum": [
+          "parent",
+          "child",
+          "grandparent",
+          "sibling",
+          "spouse"
+        ],
+        "type": "string"
+      }
+    },
+    "type": "object"
+  }
+]

changedInput schema / properties / members / items / 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."

First observedOct 5, 2026

TDQS

C2.1/5.0

Behavior2/5

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

Annotations already declare readOnlyHint, idempotentHint, non-destructive and closed-world, so safety is covered. The description's one genuine addition is the cost line ("10 credits (Tier 1)"), which is useful for billing-aware agents, but nothing is said about what the analysis produces, how member roles influence the result, or any limits.

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?

It is short and free of padding, but the four bracketed metadata lines are boilerplate that displace actual explanation, and the single semantic sentence leads with an abstraction ("signatures") rather than the concrete output.

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

Completeness2/5

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

An output schema exists, so return values need not be spelled out, but for a multi-member family computation the description omits what the pattern represents and how the optional role labels on members affect the result. An agent cannot tell from this text what it will get back or why it would pick this over the sibling family tools.

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 67% and the schema itself exhaustively documents members (2-8 entries, full birth-data rules, role enum) plus fields and precision. The description only repeats that members is required, adding no meaning beyond the structured fields.

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

Purpose2/5

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

"System-level family astrological signatures" is a tagline rather than a stated operation: there is no verb and no explanation of what a "system pattern" actually computes. Siblings such as astroway_family_genogram, astroway_family_parent_child_deep and astroway_family_sibling_dynamics all sit in the same family group, and the description draws no line between them.

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 guidance, no exclusions, and no named alternative. The only usage signal is the bracketed "[Required: members]", which restates the schema's required field rather than advising the agent.

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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