Asterwise

Western Horoscope

asterwise_get_western_horoscope

Read-onlyIdempotent

Fetches an AI-synthesised Western sun-sign horoscope for a chosen horizon and returns structured guidance fields plus metadata about the model and period.

WORKFLOW: BEFORE: None — this tool is standalone. AFTER: asterwise_get_western_natal — if the user needs a personalised tropical chart beyond sign-general copy.

INPUT CONTRACT: period is constrained to the tool schema enum (daily, weekly, monthly, yearly). sun_sign accepts English zodiac names only (Aries, Taurus, Gemini, Cancer, Leo, Virgo, Libra, Scorpio, Sagittarius, Capricorn, Aquarius, Pisces). No Sanskrit aliases — this is Western astrology. response_format selects JSON vs markdown rendering only.

DO NOT CONFUSE WITH: asterwise_get_horoscope — Vedic Moon-sign horoscope using sidereal zodiac, not Western tropical sun-sign. asterwise_get_western_natal — full personalised tropical chart from birth data, not sign-general editorial copy.

Full output and error contract: https://docs.asterwise.com/mcp/tools/get-western-horoscope/

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": {
      "sun_sign": "<sun_sign>",
      "period": "<period>"
    },
    "name": "asterwise_get_western_horoscope"
  }
}

Input Schema

Name	Required	Description	Default
`period`	Yes	Horoscope period: daily, weekly, monthly or yearly.
`sun_sign`	Yes	Western sun sign, e.g. 'Aries'.
`response_format`	No	Output format: 'markdown' (default) for a readable report, or 'json' for the raw structured payload.	markdown

Output Schema

Name	Required	Description	Default
`result`	Yes

Schema Changelog

Changes observed during successful MCP inspections.

Changed3 schema fields changedSep 5, 2026

addedInput schema / properties / period / description

Added value: +"Horoscope period: daily, weekly, monthly or yearly."

addedInput schema / properties / response_format / description

Added value: +"Output format: 'markdown' (default) for a readable report, or 'json' for the raw structured payload."

addedInput schema / properties / sun_sign / description
```
Added value: +"Western sun sign, e.g. 'Aries'."
```

Changed2 schema fields changedSep 4, 2026

addedInput schema / properties / response_format / default
```
Added value: +"markdown"
```

changedInput schema / required

Previous value: -[
-  "sun_sign",
-  "period",
-  "response_format"
-]New value: +[
+  "sun_sign",
+  "period"
+]

AddedMay 2, 2026

TDQS

A4.8/5.0

Behavior5/5

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

Beyond the read-only/idempotent annotations, the description reveals that content is AI-synthesised, that response_format only changes rendering, and that results include model/period metadata. It also points to a full output and error contract URL, so the tool's behavioral and error profile is well disclosed with no contradiction.

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 description is longer than minimal but earns its length: core function is front-loaded and the WORKFLOW/INPUT CONTRACT/DO NOT CONFUSE sections are scannable. Some redundancy exists ('chosen horizon' vs. the period parameter), but nothing is filler.

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?

For a 3-parameter, well-annotated tool with an output schema, the description covers workflow, input constraints, output highlights, sibling confusion, and directs to a full error/output contract. An agent has everything needed to decide and invoke correctly.

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

Parameters4/5

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

Schema coverage is 100%, so the baseline is a 3. The description adds useful constraints beyond the schema: sun_sign must be English zodiac names only, no Sanskrit aliases, and response_format affects rendering only. This clarifies ambiguity without compensating for missing schema docs.

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

Purpose5/5

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

The opening sentence names the exact resource ('Western sun-sign horoscope'), the action ('Fetches'), and the output shape (structured guidance fields plus metadata). It also calls out the Western/tropical distinction, so it is clearly separable from the many sibling astrology tools.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Usage Guidelines5/5

Does the description explain when to use this tool, when not to, or what alternatives exist?

The WORKFLOW section states the tool is standalone and names asterwise_get_western_natal as the AFTER option when a personalised chart is needed. DO NOT CONFUSE WITH explicitly contrasts asterwise_get_horoscope (Vedic Moon-sign) and asterwise_get_western_natal, giving an agent clear selection criteria.

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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