AstroWay Astrology API (full catalogue)

by info.astroway

Overview Discussions Admin

Rubeus: Red

astroway_geomancy_rubeus

Read-onlyIdempotent

Passion, anger, blood: ill omen.

[Group: Geomancy (Agrippa)] [Endpoint: POST /v1/geomancy/rubeus] [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_geomancy_rubeus"
  }
}

Input Schema

Name	Required	Description	Default
`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
`figure`	No
`source`	No

Schema Changelog

Changes observed during successful MCP inspections.

Changed3 schema fields changedNov 7, 2026

changedOutput schema / properties / figure / anyOf

Previous value: -[
-  {
-    "additionalProperties": {},
-    "properties": {
-      "divinatory": {
-        "anyOf": [
-          {
-            "type": "string"
-          },
-          {
-            "type": "null"
-          }
-        ]
-      },
-      "element": {
-        "anyOf": [
-          {
-            "type": "string"
-          },
-          {
-            "type": "null"
-          }
-        ]
-      },
-      "english": {
-        "anyOf": [
-          {
-            "type": "string"
-          },
-          {
-            "type": "null"
-          }
-        ]
-      },
-      "latin": {
-        "anyOf": [
-          {
-            "type": "string"
-          },
-          {
-            "type": "null"
-          }
-        ]
-      },
-      "meaning": {
-        "anyOf": [
-          {
-            "type": "string"
-          },
-          {
-            "type": "null"
-          }
-        ]
-      },
-      "nature": {
-        "anyOf": [
-          {
-            "type": "string"
-          },
-          {
-            "type": "null"
-          }
-        ]
-      },
-      "negative": {
-        "anyOf": [
-          {
-            "type": "string"
-          },
-          {
-            "type": "null"
-          }
-        ]
-      },
-      "pattern": {
-        "anyOf": [
-          {
-            "items": {
-              "anyOf": [
-                {
-                  "type": "number"
-                },
-                {
-                  "type": "null"
-                }
-              ]
-            },
-            "type": "array"
-          },
-          {
-            "type": "null"
-          }
-        ]
-      },
-      "positive": {
-        "anyOf": [
-          {
-            "type": "string"
-          },
-          {
-            "type": "null"
-          }
-        ]
-      },
-      "ruler": {
-        "anyOf": [
-          {
-            "type": "string"
-          },
-          {
-            "type": "null"
-          }
-        ]
-      },
-      "sign": {
-        "anyOf": [
-          {
-            "type": "string"
-          },
-          {
-            "type": "null"
-          }
-        ]
-      },
-      "slug": {
-        "anyOf": [
-          {
-            "type": "string"
-          },
-          {
-            "type": "null"
-          }
-        ]
-      }
-    },
-    "type": "object"
-  },
-  {
-    "type": "null"
-  }
-]New value: +[
+  {
+    "additionalProperties": {},
+    "properties": {
+      "divinatory": {
+        "type": [
+          "string",
+          "null"
+        ]
+      },
+      "element": {
+        "type": [
+          "string",
+          "null"
+        ]
+      },
+      "english": {
+        "type": [
+          "string",
+          "null"
+        ]
+      },
+      "latin": {
+        "type": [
+          "string",
+          "null"
+        ]
+      },
+      "meaning": {
+        "type": [
+          "string",
+          "null"
+        ]
+      },
+      "nature": {
+        "type": [
+          "string",
+          "null"
+        ]
+      },
+      "negative": {
+        "type": [
+          "string",
+          "null"
+        ]
+      },
+      "pattern": {
+        "anyOf": [
+          {
+            "items": {
+              "type": [
+                "number",
+                "null"
+              ]
+            },
+            "type": "array"
+          },
+          {
+            "type": "null"
+          }
+        ]
+      },
+      "positive": {
+        "type": [
+          "string",
+          "null"
+        ]
+      },
+      "ruler": {
+        "type": [
+          "string",
+          "null"
+        ]
+      },
+      "sign": {
+        "type": [
+          "string",
+          "null"
+        ]
+      },
+      "slug": {
+        "type": [
+          "string",
+          "null"
+        ]
+      }
+    },
+    "type": "object"
+  },
+  {
+    "type": "null"
+  }
+]

removedOutput schema / properties / source / anyOf

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

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

First observedOct 5, 2026

TDQS

C2.4/5.0

Behavior3/5

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

Annotations already establish readOnly, idempotent, non-destructive, and closed-world behavior, so the bar is lower. The description does add genuinely useful operational context the annotations lack: the group, the concrete endpoint, and the cost (10 credits, Tier 1). It says nothing about response shape, credit-failure behavior, or whether the reading is deterministic across repeats, but the cost disclosure is real added value.

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?

The text is short and the bracketed endpoint/cost lines are efficient, machine-scannable metadata. However, the single prose sentence is front-loaded with atmospheric flavor rather than function, so the most prominent content is the least operationally useful part.

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, and the parameters are self-documenting. What remains missing is the core fact an agent needs for a cryptically named tool: what this endpoint actually produces (a single geomancy figure reading?) and why one would invoke Rubeus rather than another figure. With 0 required parameters and no essential setup, the gaps are about intent rather than mechanics, but they are still consequential for tool selection.

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 both parameters (`fields` and `precision`) are fully documented in the schema, and the description adds nothing beyond them. Those parameters are generic response-shaping controls rather than tool-specific inputs, which makes their absence from the description unremarkable.

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?

The description contains no verb and no statement of what the tool returns: "Passion, anger, blood: ill omen" is a symbolic gloss on the Rubeus figure, not a description of an operation. It adds meaning beyond the title ("Rubeus: Red") and arguably signals which figure's interpretation applies, but an agent cannot tell from this text whether the call computes, retrieves, or generates anything.

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 routing among the 15 other geomancy figure siblings (Puer, Puella, Amissio, etc.), all of which almost certainly share the same call shape. The bracket metadata names the group but never says how to choose this figure over its siblings.

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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