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Spring Toolkit MCP

Spring Toolkit MCP

by giaffa86
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read_jacoco_report

Read JaCoCo XML coverage reports from a project's target directory to evaluate test coverage.

Instructions

Read JaCoCo XML coverage report from target/site/jacoco/jacoco.xml.

Tool call template

This tool declares no required parameters. Add optional parameters from the input schema as needed.

{
  "id": 1,
  "jsonrpc": "2.0",
  "method": "tools/call",
  "params": {
    "arguments": {},
    "name": "read_jacoco_report"
  }
}

Input Schema

NameRequiredDescriptionDefault
pathNoProject directory to inspect.

Schema Changelog

Changes observed during successful MCP inspections.

  1. First observedv0.1.0

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 should disclose behavior like error handling, return format, and parameter effect. It only states the action and default path, creating ambiguity about whether the path parameter overrides the default.

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 concise sentence, but its brevity leads to under-specification. It could be rephrased to include the parameter role.

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 complexity of sibling tools and absence of output schema, the description is incomplete. It fails to explain return value, parameter usage, or potential failure modes.

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

Parameters2/5

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

Schema coverage is 100%, but the description's fixed path contradicts the parameter's schema description ('Project directory to inspect'), causing confusion. The description adds no meaningful semantics beyond what the schema provides.

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 description clearly states the verb 'Read' and the resource 'JaCoCo XML coverage report' with a specific default path, distinguishing it from sibling tools that deal with Spring projects or other reports.

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 like read_surefire_report or other data retrieval tools. The description lacks context for appropriate use.

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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