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Jenkins MCP Server

by kud

jenkins_toggle_node_offline

Destructive

Toggle node online/offline status. Provide an optional reason when taking a node offline.

Instructions

Toggle a Jenkins node/agent between online and offline

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
instanceNoJenkins instance name (optional — defaults to first configured instance)
nodeNameYesNode/agent name
offlineMessageNoOptional reason for taking the node offline
Behavior2/5

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

Annotations already indicate destructiveHint=true and readOnlyHint=false, so description adds no behavioral insight beyond 'toggle'. It does not mention effects on running jobs, whether the operation is reversible, or what happens if node is already in the target state.

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, clear sentence with no extraneous information. It is front-loaded and efficiently communicates the core function.

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?

The tool mutates state (destructiveHint=true) and has no output schema, yet the description does not specify return values, side effects, or idempotency behavior. For a mutation tool, more context is needed to ensure safe usage.

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 description coverage is 100%, so the baseline is 3. The description adds no additional meaning to the parameters; it only restates the tool's purpose.

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?

Description clearly states verb 'Toggle' and resource 'Jenkins node/agent' with scope 'between online and offline'. It is specific and distinguishes from sibling tools like jenkins_get_node and jenkins_list_nodes, as no other sibling performs state changes on nodes.

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?

Description provides no guidance on when to use this tool versus alternatives. For example, it does not mention prerequisites (e.g., node must exist) or when to avoid using it (e.g., when nodes are processing builds).

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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