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AstroWay Astrology API (full catalogue)

MCP RAG Search

astroway_mcp_rag_search
Read-onlyIdempotent

Keyword-tag scoring over chart chunks.

[Group: MCP Advanced] [Cost: 10 credits (Tier 1)]

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
topKNo
chartYesBirth 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.
queryYes
fieldsNoCompact mode: comma-separated dotted paths to keep, relative to `data`, e.g. "planets.name,planets.longitude,houses.cusp". Omit for the whole response.
precisionNoCompact mode: round fractional numbers to this many decimals. Longitudes carry 14 by default; 2 is finer than any chart is drawn.

Output Schema

TableJSON Schema
NameRequiredDescriptionDefault
queryNo
totalNo
tokensNo
matchesNo
resultsNo

Schema Changelog

Changes observed during successful MCP inspections.

  1. First observed

TDQS

C2.7/5.0
Behavior3/5

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

The annotations already declare this as a read-only, idempotent, closed-world, non-destructive operation. The description adds cost and group context, which is useful, but does not disclose any operational behavior such as result format, ranking details, or rate-limit implications.

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 definition is very short and front-loads the core phrase before the bracketed metadata. There is no wasted prose, though the concision contributes to the broader underspecification problem rather than being a structural flaw itself.

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?

The tool takes five parameters including a nested chart object, exists among many siblings, and has an output schema. Despite that complexity, the description does not explain selection criteria, query semantics, or how this differs from report-generation tools, leaving it materially incomplete for agent routing.

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 description coverage is moderate at 60%, and the description adds no parameter meaning at all. It does not clarify what 'query' should contain, how 'topK' affects results, or how 'chart' is used, so key semantics remain dependent on the schema alone.

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?

The description says 'Keyword-tag scoring over chart chunks,' which reveals the mechanism and resource type, but it never states the core action as a verb such as 'search' and does not distinguish this tool from the many sibling retrieval/report tools. An agent can infer it is a retrieval tool, but the purpose remains vague.

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 description gives no when-to-use guidance, no prerequisites, and no alternatives to consider. It only supplies group and cost metadata, leaving the agent with no routing signal among the sibling tools.

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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