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Flux159
by Flux159

kubectl_patch

Destructive

Apply strategic, merge, or JSON patches to Kubernetes resources to modify specific fields without full resource replacement.

Instructions

Update field(s) of a resource using strategic merge patch, JSON merge patch, or JSON patch

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
resourceTypeYesType of resource to patch (e.g., pods, deployments, services)
nameYesName of the resource to patch
namespaceNoKubernetes namespacedefault
patchTypeNoType of patch to applystrategic
patchDataNoPatch data as a JSON object
patchFileNoPath to a file containing the patch data (alternative to patchData)
dryRunNoIf true, only validate the resource, don't actually execute the operation
contextNoKubeconfig Context to use for the command (optional - defaults to null)
Behavior3/5

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

Annotations already indicate destructiveHint=true, so the description's claim of 'updating' is consistent. However, it adds minimal extra transparency beyond listing patch methods—no mention of idempotency, reversibility, or required permissions, which would be valuable for a mutation tool.

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, front-loaded sentence that efficiently conveys the action and method. It could be slightly improved with a brief usage hint but is not overly verbose.

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 tool's complexity (8 parameters, three patch types, no output schema), the description is too minimal. It does not explain return values, error handling, or how to structure patches. Sibling differentiation is absent, leaving the agent without enough context to use the tool effectively.

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?

Input schema has 100% description coverage and all parameters are described. The description does not add any further meaning beyond the schema; for example, it does not clarify the difference between patchData and patchFile or provide usage examples.

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 tool's purpose: updating fields of a Kubernetes resource using specific patch methods (strategic, merge, JSON). It distinguishes from siblings like kubectl_apply (declarative create/update) and kubectl_create (create new resources).

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 fails to provide any guidance on when to use this tool versus alternatives such as kubectl_apply or kubectl_create. No context is given regarding prerequisites, distinctions between patch types, or scenarios where patching is preferred.

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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