AstroWay Astrology API (full catalogue)

by info.astroway

Overview Discussions Admin

With Changing Lines

astroway_iching_with_changing_lines

Read-onlyIdempotent

Primary + transformed hexagrams.

[Group: I Ching (Standalone)] [Endpoint: POST /v1/iching/with-changing-lines] [Cost: 10 credits (Tier 1)]

Tool call template

This tool declares no required parameters. Add optional parameters from the input schema as needed.

{
  "id": 1,
  "jsonrpc": "2.0",
  "method": "tools/call",
  "params": {
    "arguments": {},
    "name": "astroway_iching_with_changing_lines"
  }
}

Input Schema

Name	Required	Description
`seed`	No
`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
`note`	No
`seed`	No
`source`	No
`primary`	No
`changingLines`	No
`transformedHexagram`	No

Schema Changelog

Changes observed during successful MCP inspections.

Changed11 schema fields changedNov 7, 2026

removedInput schema / properties / seed / anyOf

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

addedInput schema / properties / seed / type

Added value: +[
+  "number",
+  "string"
+]

changedOutput schema / properties / changingLines / anyOf

Previous value: -[
-  {
-    "items": {
-      "anyOf": [
-        {
-          "type": "number"
-        },
-        {
-          "type": "null"
-        }
-      ]
-    },
-    "type": "array"
-  },
-  {
-    "type": "null"
-  }
-]New value: +[
+  {
+    "items": {
+      "type": [
+        "number",
+        "null"
+      ]
+    },
+    "type": "array"
+  },
+  {
+    "type": "null"
+  }
+]

removedOutput schema / properties / note / anyOf

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

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

changedOutput schema / properties / primary / anyOf

Previous value: -[
-  {
-    "additionalProperties": {},
-    "properties": {
-      "changingHexagram": {
-        "anyOf": [
-          {
-            "type": "number"
-          },
-          {
-            "type": "null"
-          }
-        ]
-      },
-      "chinese": {
-        "anyOf": [
-          {
-            "type": "string"
-          },
-          {
-            "type": "null"
-          }
-        ]
-      },
-      "lines": {
-        "anyOf": [
-          {
-            "items": {
-              "anyOf": [
-                {
-                  "additionalProperties": {},
-                  "properties": {
-                    "isChanging": {
-                      "anyOf": [
-                        {
-                          "type": "boolean"
-                        },
-                        {
-                          "type": "null"
-                        }
-                      ]
-                    },
-                    "isYang": {
-                      "anyOf": [
-                        {
-                          "type": "boolean"
-                        },
-                        {
-                          "type": "null"
-                        }
-                      ]
-                    },
-                    "value": {
-                      "anyOf": [
-                        {
-                          "type": "number"
-                        },
-                        {
-                          "type": "null"
-                        }
-                      ]
-                    }
-                  },
-                  "type": "object"
-                },
-                {
-                  "type": "null"
-                }
-              ]
-            },
-            "type": "array"
-          },
-          {
-            "type": "null"
-          }
-        ]
-      },
-      "name": {
-        "anyOf": [
-          {
-            "type": "string"
-          },
-          {
-            "type": "null"
-          }
-        ]
-      },
-      "number": {
-        "anyOf": [
-          {
-            "type": "number"
-          },
-          {
-            "type": "null"
-          }
-        ]
-      },
-      "trigrams": {
-        "anyOf": [
-          {
-            "items": {
-              "anyOf": [
-                {
-                  "type": "number"
-                },
-                {
-                  "type": "null"
-                }
-              ]
-            },
-            "type": "array"
-          },
-          {
-            "type": "null"
-          }
-        ]
-      }
-    },
-    "type": "object"
-  },
-  {
-    "type": "null"
-  }
-]New value: +[
+  {
+    "additionalProperties": {},
+    "properties": {
+      "changingHexagram": {
+        "type": [
+          "number",
+          "null"
+        ]
+      },
+      "chinese": {
+        "type": [
+          "string",
+          "null"
+        ]
+      },
+      "lines": {
+        "anyOf": [
+          {
+            "items": {
+              "anyOf": [
+                {
+                  "additionalProperties": {},
+                  "properties": {
+                    "isChanging": {
+                      "type": [
+                        "boolean",
+                        "null"
+                      ]
+                    },
+                    "isYang": {
+                      "type": [
+                        "boolean",
+                        "null"
+                      ]
+                    },
+                    "value": {
+                      "type": [
+                        "number",
+                        "null"
+                      ]
+                    }
+                  },
+                  "type": "object"
+                },
+                {
+                  "type": "null"
+                }
+              ]
+            },
+            "type": "array"
+          },
+          {
+            "type": "null"
+          }
+        ]
+      },
+      "name": {
+        "type": [
+          "string",
+          "null"
+        ]
+      },
+      "number": {
+        "type": [
+          "number",
+          "null"
+        ]
+      },
+      "trigrams": {
+        "anyOf": [
+          {
+            "items": {
+              "type": [
+                "number",
+                "null"
+              ]
+            },
+            "type": "array"
+          },
+          {
+            "type": "null"
+          }
+        ]
+      }
+    },
+    "type": "object"
+  },
+  {
+    "type": "null"
+  }
+]

removedOutput schema / properties / seed / anyOf

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

addedOutput schema / properties / seed / 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"
+]
```

changedOutput schema / properties / transformedHexagram / anyOf

Previous value: -[
-  {
-    "additionalProperties": {},
-    "properties": {
-      "chinese": {
-        "anyOf": [
-          {
-            "type": "string"
-          },
-          {
-            "type": "null"
-          }
-        ]
-      },
-      "lines": {
-        "anyOf": [
-          {
-            "items": {
-              "anyOf": [
-                {
-                  "additionalProperties": {},
-                  "properties": {
-                    "isChanging": {
-                      "anyOf": [
-                        {
-                          "type": "boolean"
-                        },
-                        {
-                          "type": "null"
-                        }
-                      ]
-                    },
-                    "isYang": {
-                      "anyOf": [
-                        {
-                          "type": "boolean"
-                        },
-                        {
-                          "type": "null"
-                        }
-                      ]
-                    },
-                    "value": {
-                      "anyOf": [
-                        {
-                          "type": "number"
-                        },
-                        {
-                          "type": "null"
-                        }
-                      ]
-                    }
-                  },
-                  "type": "object"
-                },
-                {
-                  "type": "null"
-                }
-              ]
-            },
-            "type": "array"
-          },
-          {
-            "type": "null"
-          }
-        ]
-      },
-      "name": {
-        "anyOf": [
-          {
-            "type": "string"
-          },
-          {
-            "type": "null"
-          }
-        ]
-      },
-      "number": {
-        "anyOf": [
-          {
-            "type": "number"
-          },
-          {
-            "type": "null"
-          }
-        ]
-      },
-      "trigrams": {
-        "anyOf": [
-          {
-            "items": {
-              "anyOf": [
-                {
-                  "type": "number"
-                },
-                {
-                  "type": "null"
-                }
-              ]
-            },
-            "type": "array"
-          },
-          {
-            "type": "null"
-          }
-        ]
-      }
-    },
-    "type": "object"
-  },
-  {
-    "type": "null"
-  }
-]New value: +[
+  {
+    "additionalProperties": {},
+    "properties": {
+      "chinese": {
+        "type": [
+          "string",
+          "null"
+        ]
+      },
+      "lines": {
+        "anyOf": [
+          {
+            "items": {
+              "anyOf": [
+                {
+                  "additionalProperties": {},
+                  "properties": {
+                    "isChanging": {
+                      "type": [
+                        "boolean",
+                        "null"
+                      ]
+                    },
+                    "isYang": {
+                      "type": [
+                        "boolean",
+                        "null"
+                      ]
+                    },
+                    "value": {
+                      "type": [
+                        "number",
+                        "null"
+                      ]
+                    }
+                  },
+                  "type": "object"
+                },
+                {
+                  "type": "null"
+                }
+              ]
+            },
+            "type": "array"
+          },
+          {
+            "type": "null"
+          }
+        ]
+      },
+      "name": {
+        "type": [
+          "string",
+          "null"
+        ]
+      },
+      "number": {
+        "type": [
+          "number",
+          "null"
+        ]
+      },
+      "trigrams": {
+        "anyOf": [
+          {
+            "items": {
+              "type": [
+                "number",
+                "null"
+              ]
+            },
+            "type": "array"
+          },
+          {
+            "type": "null"
+          }
+        ]
+      }
+    },
+    "type": "object"
+  },
+  {
+    "type": "null"
+  }
+]

First observedOct 5, 2026

TDQS

C2.6/5.0

Behavior3/5

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

Annotations already declare readOnly/idempotent/non-destructive, so the safety profile is covered. The description adds operating context the annotations lack: the POST endpoint, the standalone group, and a 10-credit Tier 1 cost, which is useful for an agent budgeting calls. It says nothing about how changing lines are determined or whether seed controls the cast.

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?

Very short and front-loaded with the substantive line, but three of four lines are bracketed boilerplate (group, endpoint, cost) rather than task information. Nothing is wasted, yet little is said either.

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 explained. Still, for a divination tool whose distinguishing feature is changing lines, the description never says how they arise, what the transformed hexagram signifies, or what seed does, leaving an agent unable to predict behavior before spending credits.

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 coverage is 67%, and the one undocumented parameter, `seed`, is exactly the one that governs determinism; the description says nothing about it. The `fields` and `precision` parameters are already fully explained in the schema, so the description adds no derived meaning.

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

Purpose3/5

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

"Primary + transformed hexagrams" states the resource produced (a hexagram pair) but never names the act of casting or how it differs from astroway_iching or astroway_iching_throw_coins. The reader has to infer that this is a full reading with changing lines from the tool name and title rather than the description.

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?

No when-to-use guidance at all. With four I Ching siblings (astroway_iching, astroway_iching_by_question, astroway_iching_daily, astroway_iching_throw_coins) in the list, the description gives no condition to select this one over them.

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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