Natal Astrology — Agent Interpretation Guide
For agents using the astro MCP to perform natal chart interpretation.
Framework
A natal chart is a symbolic map of personality, potential, and life themes. The art of interpretation is synthesis — weaving individual data points (planets, signs, houses, aspects) into a coherent narrative about the person.
Core Principle
Planets = what is happening (psychological functions)
Signs = how the energy behaves (style, flavor)
Houses = where in life it plays out (life areas)
Aspects = how the parts interact (support, tension, fusion)
Reading Order
Use this checklist for every natal reading:
1. Chart Overview
- Element balance: Which elements dominate? Which are missing?
- Modality balance: Cardinal/fixed/mutable distribution
- Hemisphere emphasis: Upper/lower, east/west
- Chart shape: Bundle, bowl, splash, etc.
- Stelliums: Any sign or house with 3+ planets?
2. The Big Three
- Sun (sign + house): Core identity and purpose
- Moon (sign + house): Emotional needs and instincts
- Ascendant (sign): Persona and approach to life
- Chart ruler: Ruler of the Ascendant — its sign, house, and aspects
3. Angles and Their Rulers
- Signs on the 1st, 4th, 7th, 10th house cusps
- Rulers of these angles — their condition
- Planets conjunct any angle (highly emphasized)
4. Personal Planets
- Mercury: Thinking and communication style
- Venus: Love style, values, aesthetics
- Mars: Drive, assertiveness, conflict style
- For each: sign + house + key aspects
5. Social and Outer Planets
- Jupiter: Growth, opportunity, faith
- Saturn: Challenges, lessons, mastery
- Uranus/Neptune/Pluto: Generational themes; personal when tightly aspecting angles or personal planets
6. Lunar Nodes
- South Node: Past patterns, comfort zone, innate talents
- North Node: Growth direction, life purpose
- Aspects to the nodal axis
7. Aspect Patterns
- T-squares: Stress + potential (identify apex planet)
- Grand trines: Natural talent and ease
- Grand crosses: Intense tension requiring balance
- Yods: Fated, sensitive points
8. Synthesis
- Identify 3–5 recurring themes
- Translate technical factors into plain language
- What does this person need to feel fulfilled?
- Where are their strengths and growth edges?
The Big Three in Detail
Sun — Core Identity
The Sun represents your essential self — who you are when you're being most authentic.
- Sign: How you shine. A Sun in Aries shines through initiative and courage. A Sun in Pisces shines through compassion and imagination.
- House: Where you seek recognition and purpose. Sun in the 10th = purpose through career. Sun in the 4th = purpose through home and family.
- Key aspects: Modify the expression. Sun conjunct Saturn = serious, disciplined identity. Sun square Uranus = rebellious, unpredictable identity.
Moon — Emotional World
The Moon represents your inner self — emotional needs, instincts, what makes you feel safe.
- Sign: Your emotional style. Moon in Cancer = needs nurturing and security. Moon in Aquarius = needs freedom and intellectual connection.
- House: Life area that strongly affects mood. Moon in the 7th = emotions tied to relationships. Moon in the 2nd = emotions tied to financial security.
- Key aspects: Moon-Venus = natural emotional warmth. Moon-Saturn = emotional restraint or insecurity. Moon-Mars = emotional reactivity.
Ascendant — Persona
The Ascendant is the mask you wear — how others first experience you.
- Sign: Your outward style. Aries Ascendant = direct, energetic first impression. Libra Ascendant = charming, diplomatic first impression.
- Chart ruler: The planet ruling your Ascendant sign is the most important planet in the chart. Its condition (sign, house, aspects) tells you where your life energy is directed.
Planet Interpretation Quick Reference
Personal Planets
| Planet |
Function |
Sign Shows |
House Shows |
| Sun |
Identity, purpose, vitality |
How you shine |
Where you seek recognition |
| Moon |
Emotions, needs, instincts |
Emotional style |
What affects your mood |
| Mercury |
Thinking, communication |
Mental style |
Area of focused learning |
| Venus |
Love, values, pleasure |
Love style |
What you value/attract |
| Mars |
Drive, action, conflict |
How you assert |
Where you take action |
Social Planets
| Planet |
Function |
Sign Shows |
House Shows |
| Jupiter |
Growth, faith, expansion |
How you grow |
Where opportunity flows |
| Saturn |
Discipline, fear, mastery |
How you're tested |
Where you must build |
Outer Planets
| Planet |
Function |
Personal When... |
| Uranus |
Freedom, disruption, innovation |
Conjunct Sun/Moon/Ascendant or personal planet |
| Neptune |
Dreams, spirituality, dissolution |
Conjunct Sun/Moon/Ascendant or personal planet |
| Pluto |
Power, transformation, depth |
Conjunct Sun/Moon/Ascendant or personal planet |
Sign Interpretation Quick Reference
By Element
| Element |
Expression |
| Fire |
Inspiring, energetic, action-oriented, passionate |
| Earth |
Practical, grounded, material, steady |
| Air |
Intellectual, communicative, social, conceptual |
| Water |
Emotional, intuitive, empathic, deep |
By Modality
| Modality |
Expression |
| Cardinal |
Initiating, leading, action-oriented |
| Fixed |
Determined, persistent, resistant to change |
| Mutable |
Adaptable, flexible, versatile |
House Interpretation Quick Reference
Angular Houses (1, 4, 7, 10) — Most Powerful
| House |
Domain |
"I am..." |
| 1st |
Self, identity, appearance |
"I am..." |
| 4th |
Home, family, roots |
"I come from..." |
| 7th |
Partnerships, relationships |
"I relate through..." |
| 10th |
Career, public role |
"I achieve..." |
Succedent Houses (2, 5, 8, 11) — Stabilizing
| House |
Domain |
Focus |
| 2nd |
Values, money, self-worth |
Security and resources |
| 5th |
Creativity, romance, children |
Self-expression and joy |
| 8th |
Shared resources, intimacy, transformation |
Depth and merging |
| 11th |
Friends, groups, goals |
Community and aspirations |
Cadent Houses (3, 6, 9, 12) — Transitional
| House |
Domain |
Focus |
| 3rd |
Communication, learning, siblings |
Information and connection |
| 6th |
Work, health, routines |
Service and daily life |
| 9th |
Philosophy, travel, higher mind |
Meaning and expansion |
| 12th |
Subconscious, spirituality, retreat |
Inner world and surrender |
Aspect Interpretation Quick Reference
Major Aspects
| Aspect |
Angle |
Meaning |
Keyword |
| Conjunction |
0° |
Fusion, intensification |
Blending |
| Sextile |
60° |
Cooperation, opportunity |
Supporting |
| Square |
90° |
Friction, tension, growth |
Challenging |
| Trine |
120° |
Harmony, ease, talent |
Flowing |
| Opposition |
180° |
Polarity, projection, balance |
Tension |
How to Interpret Any Aspect
- Identify the two planets — what functions do they represent?
- Note the aspect type — supportive or challenging?
- Check the houses — which life areas are involved?
- Check the signs — what's the tone of the interaction?
- Synthesize: "The [Planet A] function and [Planet B] function are [blended/in tension/in harmony], creating [dynamic] between [life area A] and [life area B]."
Key Aspect Patterns
| Pattern |
Shape |
Meaning |
| T-square |
2 oppositions + 1 square |
Stress + potential; apex planet is focal point |
| Grand trine |
3 trines (same element) |
Natural talent and ease; can be too comfortable |
| Grand cross |
2 oppositions + 4 squares |
Intense tension; requires balance and flexibility |
| Yod |
2 sextiles + 2 quincunxes |
Fated, sensitive point; apex planet is destiny focal point |
| Stellium |
3+ planets in sign/house |
Intense focus on that sign/house theme |
Synthesis: Building the Narrative
What to Look For
- Repeated themes: If Sun, Moon, and Ascendant all emphasize relationships → relationship is a core life theme
- Contradictions: Sun in Aries (assertive) but Moon in Libra (accommodating) → inner tension between self-assertion and harmony
- Compensations: Missing fire element but Mars in the 1st house → fire expressed through action rather than identity
- Dominant aspects: Multiple squares to Saturn → a "Saturnian" life with heavy lessons around responsibility
- Unaspected planets: Function operates independently, sometimes unconsciously
Output Structure for a Natal Reading
- Overview: Core personality in 2–3 sentences
- The Big Three: Sun, Moon, Ascendant — identity, emotions, persona
- Chart Ruler: Where life energy is directed
- Key Planet Placements: 3–5 most significant planet-in-sign-in-house combinations
- Major Aspects: 3–5 tightest/most significant aspects with interpretation
- Aspect Patterns: Any T-squares, grand trines, grand crosses
- Life Themes: Recurring patterns across the chart
- Strengths and Gifts: Natural talents and supportive aspects
- Growth Edges: Challenging aspects and what they're teaching
- Current Transits (optional): What's activating the chart right now
Interpretation Tone
- Empowering, not deterministic: The chart shows potential and tendencies, not fixed fate
- Strengths-first: Lead with gifts before discussing challenges
- Actionable: For each challenge, suggest what the person can do with it
- Plain language: Avoid jargon when possible; translate technical terms
- Holistic: Weave individual placements into a coherent story, not a list of bullet points
Quick Interpretation Templates
Planet in Sign in House
[Planet] in [Sign] in [House] → [Planet function] expressed in the style of [Sign keywords] through the life area of [House].
Example: "Mars in Capricorn in the 6th house → Drive and initiative (Mars) expressed with discipline and ambition (Capricorn) through daily work and health routines (6th)."
Aspect
[Planet A] in [Sign X] [aspect] [Planet B] in [Sign Y] → The [Planet A function] and [Planet B function] are [blended/in tension/in harmony], creating [dynamic] between [life area A] and [life area B].
Example: "Venus in Taurus trine Saturn in Virgo → Love and affection (Venus) flow naturally with discipline and commitment (Saturn), creating a stable, enduring approach to relationships and values."
Chart Ruler
The chart ruler is [Planet] in [Sign] in [House] → Life energy is strongly directed toward [house themes], expressed through [sign style].
Example: "The chart ruler is Mercury in Sagittarius in the 9th house → Life energy is directed toward higher learning, philosophy, and travel, expressed through an optimistic, exploratory communication style."
Common Pitfalls
- Sun sign only: The Sun is important, but it's only one piece. Always read the full chart.
- Overemphasizing hard aspects: Squares and oppositions are growth opportunities, not curses.
- Ignoring the chart ruler: The ruler of the Ascendant is often the most important planet in the chart.
- Reading planets in isolation: Always consider sign + house + aspects together.
- Deterministic language: Avoid "you will" — use "you tend to," "you may find," "there's a theme of."
- Missing the forest for the trees: Step back and identify the 3–5 big themes before diving into details.