Asterwise

Expression Number

asterwise_get_expression_number

Read-onlyIdempotent

Calculates the Expression (Destiny) number from the full name using Pythagorean letter values. Reduces each name part separately before summing — this is the Goodwin/Balliett per-part method which preserves the vibrational weight of compound numbers within each name segment. Master numbers 11, 22, 33 are preserved and not further reduced.

WORKFLOW: BEFORE: None — this tool is standalone. AFTER: asterwise_get_soul_urge_number — complete the core trinity (Expression, Soul Urge, Personality).

INPUT CONTRACT: name — Full legal name as used at birth. Include all name parts separated by spaces. Example: 'Arjun Mehta', 'Sofia Rossi', 'James Carter' Format: string, any case (uppercase/lowercase both accepted) Constraint: at least one alphabetic character required

DO NOT CONFUSE WITH: asterwise_get_soul_urge_number — vowels only, not all letters. asterwise_get_personality_number — consonants only, not all letters. asterwise_get_numerology_profile — returns Expression plus all other core numbers, pinnacles, challenges, and lucky numbers in one call. asterwise_get_chaldean_numerology — different letter-value system (Chaldean 1–8).

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

Input Schema

TableJSON Schema

Name	Required	Description	Default
`name`	Yes	Person's full name as commonly written; letters are converted to numerology values.
`response_format`	No	Output format: 'markdown' (default) for a readable report, or 'json' for the raw structured payload.	markdown

Output Schema

TableJSON Schema

Name	Required	Description	Default
`result`	Yes

Schema Changelog

Changes observed during successful MCP inspections. Dates show when Glama detected each change.

Changed2 schema fields changedSep 5, 2026

addedInput schema / properties / name / description

Added value: +"Person's full name as commonly written; letters are converted to numerology values."

addedInput schema / properties / response_format / description

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

Changed2 schema fields changedSep 4, 2026
- addedInput schema / properties / response_format / default
```
Added value: +"markdown"
```
- changedInput schema / required
```
Previous value: -[
-  "name",
-  "response_format"
-]New value: +[
+  "name"
+]
```
AddedMay 1, 2026

TDQS

A5/5.0

Behavior5/5

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

Annotations already establish safety (read-only, idempotent, non-destructive); the description adds the non-obvious per-part reduction method and master-number preservation rule, which affect interpretability. It also links to a full output/error contract.

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?

Front-loaded with the core calculation, then organized into labeled WORKFLOW, INPUT CONTRACT, and DO NOT CONFUSE WITH blocks. Each section adds actionable information without redundancy, and examples anchor the format.

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?

Between the schema, annotations, output schema, and the description's workflow/input/alternatives/error-contract link, an agent has everything needed to select and invoke the tool correctly. No critical dimension is left unexplained.

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

Parameters5/5

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

Schema covers both parameters completely, but the description enriches the `name` parameter with legal-name-at-birth semantics, space separation requirement, case-insensitivity, and an alphabetic-character constraint. The response_format parameter is already fully documented in the schema.

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 first sentence names the exact operation ('Calculates the Expression (Destiny) number'), the input ('full name'), and the method ('Pythagorean letter values'). It also explicitly distinguishes itself from sibling tools (soul urge, personality, numerology_profile, chaldean), so an agent can tell them apart without opening their schemas.

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 'DO NOT CONFUSE WITH' section explicitly lists when not to use each alternative, and WORKFLOW states this is a standalone step with a prescribed AFTER tool. This gives the agent unambiguous 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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TDQS

A3.9/5.0

Disambiguation3/5

Many tools are well-differentiated by explicit 'DO NOT CONFUSE WITH' notes, but the sheer number of near-neighbor pairs (e.g., crystal vs gemstone recommendations, natal chart variants, dasha systems, compatibility systems, tarot draw variants) creates real selection risk. The descriptions mitigate overlap, but an agent browsing 103 tools will struggle to pick the right one.

Naming Consistency5/5

Every tool follows the asterwise_get_* or asterwise_draw_* prefix convention with a clear noun phrase (e.g., asterwise_get_natal_chart, asterwise_draw_tarot_cards). The two verbs 'get' and 'draw' are semantically appropriate, and there are no camelCase or mixed-style names.

Tool Count1/5

103 tools is far beyond a manageable MCP surface. While the domain is broad (Vedic astrology, Western astrology, numerology, tarot, crystals, dream symbols), the server bundles multiple distinct domains into one namespace, making it nearly impossible for an agent to discover the right tool efficiently.

Completeness4/5

The surface is impressively comprehensive across astrology, numerology, tarot, and remedies, with deep coverage of dasha systems, compatibility frameworks, and chart types. Minor gaps exist (e.g., no tarot interpretation endpoint, no batch operations, no update/delete since it's read-only data), but for a reference/prediction API the coverage is strong.

Resources

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