spring-mosaic

explain_pattern

Explains Spring/Java patterns including JPA, REST, security, and transactions with detailed insights.

Instructions

Deep-dive on a Spring/Java topic (jpa, rest, security, transactions, etc.).

Tool call template

Replace each placeholder with a value matching the input schema. Only required parameters are included; add optional parameters as needed.

{
  "id": 1,
  "jsonrpc": "2.0",
  "method": "tools/call",
  "params": {
    "arguments": {
      "topic": "<topic>"
    },
    "name": "explain_pattern"
  }
}

Input Schema

Name	Required	Description	Default
`topic`	Yes	e.g. jpa, rest dto, constructor injection, boot3
`workspaceRoot`	No

Schema Changelog

Changes observed during successful MCP inspections.

First observedv0.1.0Jul 28, 2026

TDQS

C2.9/5.0

Behavior2/5

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

With no annotations, the description must fully disclose behavioral traits, but it only states the tool's purpose. It does not indicate side effects, read-only nature, or any requirements, leaving the agent with insufficient information.

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 a single, well-structured sentence that immediately conveys the tool's purpose without superfluous words. It is appropriately sized for the tool's simplicity.

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?

Given the lack of output schema and only two parameters (one undocumented), the description is incomplete. It does not specify return format, depth of explanation, or how workspaceRoot is used, leaving gaps for the agent.

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?

The topic parameter's description gives examples (jpa, rest dto, constructor injection), adding value beyond the schema type. However, the workspaceRoot parameter lacks any description, and the tool description does not compensate for the 50% schema coverage gap.

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 'Deep-dive on a Spring/Java topic' clearly states the verb (deep-dive, i.e., explain) and resource (Spring/Java topics like jpa, rest). It distinguishes from sibling tools such as get_quality_guide and review_architecture, which serve different purposes.

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?

The description provides no guidance on when to use this tool versus alternatives like get_quality_guide or detect_spring_context. There is no mention of prerequisites, exclusions, or typical scenarios.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.

Deploy Server