AstroWay Astrology API (full catalogue)

Forecast Calendar

astroway_prognostics_forecast_calendar

Read-onlyIdempotent

Generate a combined forecast calendar including transits, lunar phases, ingresses, and retrograde stations for a given period.

[Group: Prognostics] [Endpoint: POST /v1/forecast-calendar] [Cost: 100 credits (Tier 4)]

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_forecast_calendar"
  }
}

Input Schema

Name	Required	Description
`body`	Yes	Wrapper { natal: ChartInput } used by endpoints that take a base natal plus extra parameters in flat fields.
`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.
`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
`year`	No
`cells`	No
`maxAbsTotal`	No
`dailySummary`	No

Schema Changelog

Changes observed during successful MCP inspections.

Changed7 schema fields changedNov 7, 2026

changedInput schema / properties / body / allOf

Previous value: -[
-  {
-    "description": "Wrapper { natal: ChartInput } used by endpoints that take a base natal plus extra parameters in flat fields.",
-    "properties": {
-      "natal": {
-        "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"
-      }
-    },
-    "required": [
-      "natal"
-    ],
-    "type": "object"
-  },
-  {
-    "properties": {
-      "year": {
-        "anyOf": [
-          {
-            "type": "number"
-          },
-          {
-            "type": "null"
-          }
-        ]
-      }
-    },
-    "required": [
-      "year"
-    ],
-    "type": "object"
-  }
-]New value: +[
+  {
+    "description": "Wrapper { natal: ChartInput } used by endpoints that take a base natal plus extra parameters in flat fields.",
+    "properties": {
+      "natal": {
+        "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"
+      }
+    },
+    "required": [
+      "natal"
+    ],
+    "type": "object"
+  },
+  {
+    "properties": {
+      "year": {
+        "type": [
+          "number",
+          "null"
+        ]
+      }
+    },
+    "required": [
+      "year"
+    ],
+    "type": "object"
+  }
+]

changedOutput schema / properties / cells / anyOf

Previous value: -[
-  {
-    "items": {
-      "anyOf": [
-        {
-          "items": {
-            "anyOf": [
-              {
-                "additionalProperties": {},
-                "properties": {
-                  "events": {
-                    "anyOf": [
-                      {
-                        "items": {
-                          "anyOf": [
-                            {},
-                            {
-                              "type": "null"
-                            }
-                          ]
-                        },
-                        "type": "array"
-                      },
-                      {
-                        "type": "null"
-                      }
-                    ]
-                  },
-                  "harmonious": {
-                    "anyOf": [
-                      {
-                        "type": "number"
-                      },
-                      {
-                        "type": "null"
-                      }
-                    ]
-                  },
-                  "house": {
-                    "anyOf": [
-                      {
-                        "type": "number"
-                      },
-                      {
-                        "type": "null"
-                      }
-                    ]
-                  },
-                  "month": {
-                    "anyOf": [
-                      {
-                        "type": "number"
-                      },
-                      {
-                        "type": "null"
-                      }
-                    ]
-                  },
-                  "neutral": {
-                    "anyOf": [
-                      {
-                        "type": "number"
-                      },
-                      {
-                        "type": "null"
-                      }
-                    ]
-                  },
-                  "tense": {
-                    "anyOf": [
-                      {
-                        "type": "number"
-                      },
-                      {
-                        "type": "null"
-                      }
-                    ]
-                  },
-                  "total": {
-                    "anyOf": [
-                      {
-                        "type": "number"
-                      },
-                      {
-                        "type": "null"
-                      }
-                    ]
-                  }
-                },
-                "type": "object"
-              },
-              {
-                "type": "null"
-              }
-            ]
-          },
-          "type": "array"
-        },
-        {
-          "type": "null"
-        }
-      ]
-    },
-    "type": "array"
-  },
-  {
-    "type": "null"
-  }
-]New value: +[
+  {
+    "items": {
+      "anyOf": [
+        {
+          "items": {
+            "anyOf": [
+              {
+                "additionalProperties": {},
+                "properties": {
+                  "events": {
+                    "anyOf": [
+                      {
+                        "items": {
+                          "anyOf": [
+                            {},
+                            {
+                              "type": "null"
+                            }
+                          ]
+                        },
+                        "type": "array"
+                      },
+                      {
+                        "type": "null"
+                      }
+                    ]
+                  },
+                  "harmonious": {
+                    "type": [
+                      "number",
+                      "null"
+                    ]
+                  },
+                  "house": {
+                    "type": [
+                      "number",
+                      "null"
+                    ]
+                  },
+                  "month": {
+                    "type": [
+                      "number",
+                      "null"
+                    ]
+                  },
+                  "neutral": {
+                    "type": [
+                      "number",
+                      "null"
+                    ]
+                  },
+                  "tense": {
+                    "type": [
+                      "number",
+                      "null"
+                    ]
+                  },
+                  "total": {
+                    "type": [
+                      "number",
+                      "null"
+                    ]
+                  }
+                },
+                "type": "object"
+              },
+              {
+                "type": "null"
+              }
+            ]
+          },
+          "type": "array"
+        },
+        {
+          "type": "null"
+        }
+      ]
+    },
+    "type": "array"
+  },
+  {
+    "type": "null"
+  }
+]

changedOutput schema / properties / dailySummary / anyOf

Previous value: -[
-  {
-    "items": {
-      "anyOf": [
-        {
-          "additionalProperties": {},
-          "properties": {
-            "date": {
-              "anyOf": [
-                {
-                  "type": "string"
-                },
-                {
-                  "type": "null"
-                }
-              ]
-            },
-            "harmonious": {
-              "anyOf": [
-                {
-                  "type": "number"
-                },
-                {
-                  "type": "null"
-                }
-              ]
-            },
-            "jd": {
-              "anyOf": [
-                {
-                  "type": "number"
-                },
-                {
-                  "type": "null"
-                }
-              ]
-            },
-            "tense": {
-              "anyOf": [
-                {
-                  "type": "number"
-                },
-                {
-                  "type": "null"
-                }
-              ]
-            },
-            "total": {
-              "anyOf": [
-                {
-                  "type": "number"
-                },
-                {
-                  "type": "null"
-                }
-              ]
-            }
-          },
-          "type": "object"
-        },
-        {
-          "type": "null"
-        }
-      ]
-    },
-    "type": "array"
-  },
-  {
-    "type": "null"
-  }
-]New value: +[
+  {
+    "items": {
+      "anyOf": [
+        {
+          "additionalProperties": {},
+          "properties": {
+            "date": {
+              "type": [
+                "string",
+                "null"
+              ]
+            },
+            "harmonious": {
+              "type": [
+                "number",
+                "null"
+              ]
+            },
+            "jd": {
+              "type": [
+                "number",
+                "null"
+              ]
+            },
+            "tense": {
+              "type": [
+                "number",
+                "null"
+              ]
+            },
+            "total": {
+              "type": [
+                "number",
+                "null"
+              ]
+            }
+          },
+          "type": "object"
+        },
+        {
+          "type": "null"
+        }
+      ]
+    },
+    "type": "array"
+  },
+  {
+    "type": "null"
+  }
+]

removedOutput schema / properties / maxAbsTotal / anyOf

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

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

removedOutput schema / properties / year / anyOf

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

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

Changed1 schema field changedNov 6, 2026

changedInput schema / properties / body / allOf

Previous value: -[
-  {
-    "description": "Wrapper { natal: ChartInput } used by endpoints that take a base natal plus extra parameters in flat fields.",
-    "properties": {
-      "natal": {
-        "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"
-      }
-    },
-    "required": [
-      "natal"
-    ],
-    "type": "object"
-  },
-  {
-    "properties": {
-      "year": {
-        "anyOf": [
-          {
-            "type": "number"
-          },
-          {
-            "type": "null"
-          }
-        ]
-      }
-    },
-    "required": [
-      "year"
-    ],
-    "type": "object"
-  }
-]New value: +[
+  {
+    "description": "Wrapper { natal: ChartInput } used by endpoints that take a base natal plus extra parameters in flat fields.",
+    "properties": {
+      "natal": {
+        "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"
+      }
+    },
+    "required": [
+      "natal"
+    ],
+    "type": "object"
+  },
+  {
+    "properties": {
+      "year": {
+        "anyOf": [
+          {
+            "type": "number"
+          },
+          {
+            "type": "null"
+          }
+        ]
+      }
+    },
+    "required": [
+      "year"
+    ],
+    "type": "object"
+  }
+]

First observedOct 5, 2026

TDQS

A3.6/5.0

Behavior4/5

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

Annotations already declare readOnly, idempotent, non-destructive, and closed-world, so the safety profile is covered. The description adds genuinely useful non-annotation context: the POST endpoint and a concrete cost of 100 credits (Tier 4), which lets an agent budget before calling. It stops short of noting response volume or whether the calendar range is bounded.

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?

The operative sentence is front-loaded and content-dense, with metadata (group, endpoint, cost) neatly bracketed below. Nothing is wasted, though the metadata lines are boilerplate rather than descriptive prose.

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

Completeness5/5

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

With an output schema present, return values need not be explained, and the annotations plus the stated credit cost cover the economics and safety an agent needs. The remaining risk area, choosing this over the transit-calendar sibling, is a usage-guideline gap rather than a completeness gap.

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

Parameters3/5

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

Schema description coverage is 100%, so the nested natal object, year, fields, and precision are already documented in detail, justifying the baseline. The description adds nothing parameter-level and its phrase "for a given period" is slightly looser than the schema, which exposes only a bare `year` value.

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?

"Generate a combined forecast calendar" names a specific verb and resource, and the enumeration (transits, lunar phases, ingresses, retrograde stations) pins down what the output contains. It does not, however, distinguish it from the very close sibling astroway_prognostics_transit_calendar, which an agent would have to inspect separately.

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?

The only usage signal is the phrase "for a given period"; there is no statement of when to pick this over astroway_prognostics_transit_calendar, astroway_prognostics_transits, or the return/progression siblings. No prerequisites, exclusions, or alternative routing are given.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.

All AstroWay Astrology API (full catalogue) tools Inspect

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