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kg_add_service

Add or update a service node in the architecture knowledge graph, specifying its domain, owner, tags, and links to documentation.

Instructions

Add or update a service in the knowledge graph.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
idYesUnique service identifier (stable; reused across diagrams).
labelNoDisplay name (defaults to id).
component_typeNoTechnology for auto-styling (e.g. "postgresql", "kafka").
descriptionNoFree-text description.
domainNoBounded-context / team / tier this service belongs to.
ownerNoOwning team or person (e.g. "@payments").
tagsNoArbitrary tags.
linksNoRelated URLs (ADRs, runbooks, dashboards).
shapeNoShape override (rectangle/diamond/ellipse/circle/stadium/parallelogram).
graph_pathNoKnowledge file path..claude/architecture.md

Output Schema

TableJSON Schema
NameRequiredDescriptionDefault
resultYes
Behavior2/5

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

No annotations provided, so description carries full burden. It only says 'add or update' but does not disclose idempotency, merge behavior, side effects, permissions, or error handling. The mutation behavior is implied but not explained.

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?

Single sentence, efficient and front-loaded with purpose. However, overly concise given tool complexity; could benefit from brief behavioral notes.

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?

Complex tool with 10 parameters and output schema not described. No information about return value, format, or what 'add or update' means for existing services. Given richness of schema, more context expected.

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%, so parameters are well-documented in schema. Description adds no extra meaning beyond the schema. Baseline 3 is appropriate.

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?

Description clearly states 'Add or update a service in the knowledge graph.' The verb 'add or update' and resource 'service' are specific. Sibling tools include kg_remove_service, kg_link, etc., making the tool's role distinct.

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?

No guidance on when to use this tool vs alternatives. No mention of prerequisites, when not to use, or scenarios for adding vs updating. Sibling tools exist but are not referenced.

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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