Skip to main content
Glama
Sign In
java-jdtls-mcp-server

java-jdtls-mcp-server

by SachieWang
OverviewSchemaSourceRelated ServersDiscussionsAdmin
TypeScript
Local

java_restart

Restart the Java Language Server to refresh its state and apply new configuration settings.

Instructions

Restart the Java Language Server (JDT.LS).

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": {
      "jdtlsHome": "<jdtlsHome>"
    },
    "name": "java_restart"
  }
}

Input Schema

NameRequiredDescriptionDefault
jdtlsHomeYesPath to JDT.LS installation root directory
workspacePathNoPath to the workspace root (default: current directory)
javaHomeNoPath to Java Home (overrides JAVA_HOME env var)
javaRuntimesNoList of Java Runtimes for different versions
mavenConfigNoCustom Maven configuration

Schema Changelog

Changes observed during successful MCP inspections.

  1. First observedv1.0.0

TDQS

B3.1/5.0
Behavior2/5

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

With no annotations, the description must disclose behavior. It only says 'Restart', but does not explain what restart entails (e.g., stopping the server, impact on open files, diagnostics, or configuration reload). No side effects or permissions are mentioned.

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?

The description is a single short sentence, which is concise and front-loaded. However, it could be slightly more informative without being verbose, so a 4 is appropriate.

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 (5 parameters, nested objects, no output schema, no annotations), the description is incomplete. It lacks information on return values, prerequisites, side effects, or how the restart interacts with sibling tools.

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 all parameters have descriptions in the schema. The description adds no additional meaning beyond the schema, hence baseline score of 3.

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 'Restart' and the resource 'Java Language Server (JDT.LS)', distinguishing it from siblings like java_start (which starts) and configure_jdt_ls (which configures). The purpose is unambiguous.

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 is provided on when to use this tool versus alternatives (e.g., java_start, configure_jdt_ls). It does not specify prerequisites, such as whether the server must already be running, or context for restart (e.g., after configuration changes).

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

Deploy Server

Other Tools