AstroWay Platform

Stream Positions

astroway_stream_positions

Current planetary positions snapshot, tickSeconds=30.

[Group: Real-time Streaming] [Endpoint: POST /v1/stream/positions] [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_stream_positions"
  }
}

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
`planets`	No
`pricing`	No
`julianDay`	No
`timestamp`	No
`transport`	No
`sseUpgrade`	No
`tickSeconds`	No

Schema Changelog

Changes observed during successful MCP inspections.

Changed13 schema fields changedNov 7, 2026

removedOutput schema / properties / julianDay / anyOf

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

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

changedOutput schema / properties / planets / anyOf

Previous value: -[
-  {
-    "items": {
-      "anyOf": [
-        {
-          "additionalProperties": {},
-          "properties": {
-            "degreeInSign": {
-              "anyOf": [
-                {
-                  "type": "number"
-                },
-                {
-                  "type": "null"
-                }
-              ]
-            },
-            "id": {
-              "anyOf": [
-                {
-                  "type": "number"
-                },
-                {
-                  "type": "null"
-                }
-              ]
-            },
-            "latitude": {
-              "anyOf": [
-                {
-                  "type": "number"
-                },
-                {
-                  "type": "null"
-                }
-              ]
-            },
-            "longitude": {
-              "anyOf": [
-                {
-                  "type": "number"
-                },
-                {
-                  "type": "null"
-                }
-              ]
-            },
-            "name": {
-              "anyOf": [
-                {
-                  "type": "string"
-                },
-                {
-                  "type": "null"
-                }
-              ]
-            },
-            "retrograde": {
-              "anyOf": [
-                {
-                  "type": "boolean"
-                },
-                {
-                  "type": "null"
-                }
-              ]
-            },
-            "sign": {
-              "anyOf": [
-                {
-                  "type": "string"
-                },
-                {
-                  "type": "null"
-                }
-              ]
-            },
-            "speed": {
-              "anyOf": [
-                {
-                  "type": "number"
-                },
-                {
-                  "type": "null"
-                }
-              ]
-            }
-          },
-          "type": "object"
-        },
-        {
-          "type": "null"
-        }
-      ]
-    },
-    "type": "array"
-  },
-  {
-    "type": "null"
-  }
-]New value: +[
+  {
+    "items": {
+      "anyOf": [
+        {
+          "additionalProperties": {},
+          "properties": {
+            "degreeInSign": {
+              "type": [
+                "number",
+                "null"
+              ]
+            },
+            "id": {
+              "type": [
+                "number",
+                "null"
+              ]
+            },
+            "latitude": {
+              "type": [
+                "number",
+                "null"
+              ]
+            },
+            "longitude": {
+              "type": [
+                "number",
+                "null"
+              ]
+            },
+            "name": {
+              "type": [
+                "string",
+                "null"
+              ]
+            },
+            "retrograde": {
+              "type": [
+                "boolean",
+                "null"
+              ]
+            },
+            "sign": {
+              "type": [
+                "string",
+                "null"
+              ]
+            },
+            "speed": {
+              "type": [
+                "number",
+                "null"
+              ]
+            }
+          },
+          "type": "object"
+        },
+        {
+          "type": "null"
+        }
+      ]
+    },
+    "type": "array"
+  },
+  {
+    "type": "null"
+  }
+]

removedOutput schema / properties / pricing / anyOf

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

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

removedOutput schema / properties / sseUpgrade / anyOf

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

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

removedOutput schema / properties / tickSeconds / anyOf

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

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

removedOutput schema / properties / timestamp / anyOf

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

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

removedOutput schema / properties / transport / anyOf

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

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

First observedOct 5, 2026

TDQS

B3.4/5.0

Behavior4/5

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

The description adds context not present in the annotations: the POST endpoint (which explains why readOnlyHint=false for an otherwise read-like snapshot), a 10-credit Tier 1 cost, and a 30-second tick. It does not clarify whether the call is a one-shot snapshot or an open stream, which is the main remaining behavioral ambiguity.

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?

It is short and front-loads the core meaning in the first clause, with metadata tags after. The fragment style omits a verb and the bracketed tags read as internal annotations rather than prose, but nothing is wasted.

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

Completeness3/5

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 cost, endpoint, and cadence are covered. However, for a tool in a large family of streaming siblings, the definition never says how it differs or whether the result is a single snapshot or a continuous feed, leaving a real gap for a 2-parameter POST tool.

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% and both parameters (fields, precision) are fully documented in the schema, including examples and defaults. The description adds nothing about them, so the baseline of 3 applies.

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?

The description names a specific resource and output: 'Current planetary positions snapshot', and the endpoint and group tags confirm it is a real-time position feed. It does not explicitly distinguish itself from related streaming siblings such as astroway_mcp_streaming or the other astroway_stream_* tools, so it falls short of a 5.

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 or when-not-to-use guidance and no named alternative. The only usage signal is the incidental 'tickSeconds=30', which hints at a polling cadence but never states that an agent should poll this rather than call a one-shot chart endpoint.

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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