io.github.shigechika/junos-mcp

get_version

Check JUNOS device version and upgrade status. Retrieve running, planning, and pending versions, package status, and reboot schedule for a specified hostname.

Instructions

Get JUNOS version information with upgrade status.

Shows running version, planning version, pending version, local/remote package status, and reboot schedule.

Args: hostname: Target device hostname (must exist in config.ini) config_path: Path to config.ini (empty string uses default search)

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": {
      "hostname": "<hostname>"
    },
    "name": "get_version"
  }
}

Input Schema

Name	Required	Description	Default
`hostname`	Yes
`config_path`	No

Output Schema

Name	Required	Description	Default
`result`	Yes

Schema Changelog

Changes observed during successful MCP inspections.

First observedv0.1.0May 26, 2026

TDQS

A3.6/5.0

Behavior3/5

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

Without annotations, the description carries the full burden. It discloses the output categories (running, planning, pending, package status, schedule), implying a read-only operation. However, it does not address potential side effects, authentication needs, or error behavior (e.g., missing hostname), leaving some behavioral gaps.

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 front-loaded with the primary purpose and lists version details compactly. The Args section is clear but somewhat redundant with the schema. Overall, it is efficient with minimal waste, earning a 4.

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

Completeness3/5

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

Given the presence of an output schema (not shown), the description reasonably covers the returned information. It does not explain error conditions or usage context relative to sibling tools. For a simple retrieval tool, it is adequate but could be more thorough about prerequisites and edge cases.

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

Parameters4/5

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

The input schema has 0% description coverage, so the description compensates by adding meaning: hostname must exist in config.ini, config_path defaults to empty string for default search. These enrich the bare schema types, though further details (e.g., format of hostname) are omitted.

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 explicitly states 'Get JUNOS version information with upgrade status,' clearly identifying the verb (Get) and resource (JUNOS version information). It lists specific details like running, planning, and pending versions, which distinguishes it from sibling tools such as get_device_facts or compare_version.

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 explicit guidance on when to use this tool versus alternatives. The description only specifies the required parameter (hostname) and default for config_path, but does not mention any prerequisites, exclusion criteria, or comparisons with sibling tools like check_upgrade_readiness or get_device_facts.

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