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sevoniva

OceanBase MCP

by sevoniva

Generate ER Documentation

ob_generate_er_document

Generate documentation of database entity relationships in Markdown, PlantUML, or DOT formats, using metadata and relationship evidence, with customizable depth and table selection.

Instructions

Generate Markdown, PlantUML, and DOT documentation from allowed ER metadata and relationship evidence.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
depthNo
tableNo
titleNo
schemaNo
tablesNo
formatsNo
profileNo
maxTablesNo
businessTermNo
minConfidenceNo
includeInferredNo
maxRelationshipsNo
relationshipModeNoforeign_key
Behavior2/5

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

No annotations are provided, so the description carries the full burden. It mentions 'allowed ER metadata' implying some access control but does not disclose read/write behavior, side effects, or permissions required. This is insufficient for a complex tool.

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

Conciseness3/5

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

The description is a single sentence, which is concise but lacks structure. It front-loads the main purpose but omits critical details, so it achieves conciseness at the expense of clarity.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Completeness1/5

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

Given the tool's complexity (13 parameters, no output schema, no annotations), the description is severely incomplete. It fails to explain expected outputs, parameter interactions, or any usage constraints, leaving the agent with insufficient information.

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

Parameters1/5

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

The description does not explain any of the 13 parameters. With 0% schema description coverage, the agent has no additional guidance on how to use parameters like 'depth', 'table', 'title', etc., making it very difficult to invoke correctly.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Purpose4/5

Does the description clearly state what the tool does and how it differs from similar tools?

The description clearly states the tool generates documentation in Markdown, PlantUML, and DOT formats from ER metadata. However, it does not distinguish this tool from siblings like 'ob_generate_er_diagram' or 'ob_generate_er_html', which could lead to confusion.

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?

There is no explicit guidance on when to use this tool versus alternatives. With many similar ER generation tools in the sibling list, the description lacks context for choosing the right tool.

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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