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davidmosiah

Astral MCP

Astral Connection Status

astral_connection_status
Read-onlyIdempotent

Verifies Node version, loads ephemerides, and runs a dual-engine precision audit on a sample chart to confirm the install is working before computing real charts.

Instructions

Health check. The server is stateless and local, so this verifies the Node version and proves both bundled ephemerides load and agree by computing a sample chart and running the dual-engine precision audit. Call this to confirm the install is working before computing real charts.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
response_formatNoOutput shape. 'markdown' is a readable briefing for display; 'json' returns the full structured chart for further processing.markdown

Output Schema

TableJSON Schema
NameRequiredDescriptionDefault
okYes
nodeYes
notesYes
readyYes
enginesYes
next_stepsYes
self_checkNo
Behavior4/5

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

Annotations already declare readOnlyHint, destructiveHint, and idempotentHint. The description adds value by explaining the internal process (sample chart, dual-engine audit) and the stateless/local nature, which are not covered by annotations.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Conciseness5/5

Is the description appropriately sized, front-loaded, and free of redundancy?

The description is three sentences, front-loaded with 'Health check,' and each sentence adds value. No unnecessary words.

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?

The tool is simple with 0 required parameters and an output schema exists. The description covers purpose, behavior, and usage context adequately. No gaps.

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 coverage is 100%, and the parameter is simple. The description does not add additional meaning beyond the schema's description of response_format. Baseline score of 3 is appropriate as no extra parameter guidance is needed.

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 description clearly identifies the tool as a health check with specific actions: verifying Node version, testing ephemerides, computing a sample chart, and running a precision audit. It distinguishes from sibling tools like astral_compute_natal_chart by being a diagnostic rather than a chart computation tool.

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

Usage Guidelines4/5

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

The description explicitly states when to use: 'Call this to confirm the install is working before computing real charts.' This provides clear context, though it does not list explicit alternatives or exclusions. The usage is well-defined.

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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