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Cloudflare: list load balancers

cf_load_balancers_list
Read-only

List account Load Balancers (name, hostname, enabled, pools). Optional zone filter. Requires Account Load Balancers Read.

Input Schema

NameRequiredDescriptionDefault
pageNo
zoneNoFilter by zone name (e.g. your-tenant.com) or zone ID
searchNoSearch load balancers by name or hostname
per_pageNo
zoneOrIdNoZone name (e.g. your-tenant.com) or zone ID to resolve account.id
accountIdNoCloudflare account ID; overrides CLOUDFLARE_ACCOUNT_ID and zone.account.id
context_idNoOptional explicit Connection Hub work context (ctx_*). Omit to use the conversation's active workspace; global Hub tools ignore it.
account_slugNoCloudflare account slug. Required when the workspace has multiple accounts and the zone is not yet cataloged.
environment_slugNoCloud Catalog environment used as an account-routing preference when no zone is provided.

Output Schema

NameRequiredDescriptionDefault
okYes
dataYes
contractVersionYes
dataSchemaVersionYes

Schema Changelog

Changes observed during successful MCP inspections.

  1. Changed16 schema fields changed
    • changedOutput schema / properties / data / additionalProperties
      Previous value: -trueNew value: +false
    • removedOutput schema / properties / data / properties / count
      Removed value: -{
      -  "type": "number"
      -}
    • removedOutput schema / properties / data / properties / errors
      Removed value: -{
      -  "items": {
      -    "$ref": "#/properties/data/properties/result/anyOf/0/items"
      -  },
      -  "type": "array"
      -}
    • addedOutput schema / properties / data / properties / gaps
      Added value: +{
      +  "items": {
      +    "type": "string"
      +  },
      +  "type": "array"
      +}
    • removedOutput schema / properties / data / properties / items
      Removed value: -{
      -  "$ref": "#/properties/data/properties/result/anyOf/0"
      -}
    • addedOutput schema / properties / data / properties / loadBalancers
      Added value: +{
      +  "items": {
      +    "additionalProperties": false,
      +    "properties": {
      +      "defaultPools": {
      +        "items": {
      +          "type": "string"
      +        },
      +        "type": "array"
      +      },
      +      "enabled": {
      +        "type": "boolean"
      +      },
      +      "fallbackPool": {
      +        "type": "string"
      +      },
      +      "id": {
      +        "type": "string"
      +      },
      +      "name": {
      +        "type": "string"
      +      }
      +    },
      +    "required": [
      +      "id",
      +      "name"
      +    ],
      +    "type": "object"
      +  },
      +  "type": "array"
      +}
    • removedOutput schema / properties / data / properties / messages
      Removed value: -{
      -  "items": {
      -    "anyOf": [
      -      {
      -        "type": "string"
      -      },
      -      {
      -        "$ref": "#/properties/data/properties/result/anyOf/0/items"
      -      }
      -    ]
      -  },
      -  "type": "array"
      -}
    • addedOutput schema / properties / data / properties / partial
      Added value: +{
      +  "type": "boolean"
      +}
    • removedOutput schema / properties / data / properties / result
      Removed value: -{
      -  "anyOf": [
      -    {
      -      "items": {
      -        "additionalProperties": true,
      -        "properties": {},
      -        "type": "object"
      -      },
      -      "type": "array"
      -    },
      -    {
      -      "$ref": "#/properties/data/properties/result/anyOf/0/items"
      -    }
      -  ]
      -}
    • removedOutput schema / properties / data / properties / result_info
      Removed value: -{
      -  "$ref": "#/properties/data/properties/result/anyOf/0/items"
      -}
    • removedOutput schema / properties / data / properties / success
      Removed value: -{
      -  "type": "boolean"
      -}
    • addedOutput schema / properties / data / properties / truncated
      Added value: +{
      +  "type": "boolean"
      +}
    • addedOutput schema / properties / data / properties / warnings
      Added value: +{
      +  "items": {
      +    "type": "string"
      +  },
      +  "type": "array"
      +}
    • addedOutput schema / properties / data / required
      Added value: +[
      +  "loadBalancers",
      +  "partial",
      +  "truncated",
      +  "warnings",
      +  "gaps"
      +]
    • addedOutput schema / properties / dataSchemaVersion
      Added value: +{
      +  "const": 2,
      +  "type": "number"
      +}
    • changedOutput schema / required
      Previous value: -[
      -  "contractVersion",
      -  "ok",
      -  "data"
      -]New value: +[
      +  "contractVersion",
      +  "dataSchemaVersion",
      +  "ok",
      +  "data"
      +]
  2. First observed

TDQS

A3.6/5.0
Behavior3/5

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

Annotations already mark this as a read-only, non-destructive, non-open-world operation. The description adds a useful authorization requirement ('Requires Account Load Balancers Read') and the zone-filter scoping, but does not discuss pagination behavior or account-routing nuances.

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 compact sentence plus a permission note, with the core purpose and scoping front-loaded. Every sentence contributes useful information without repetition.

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

Completeness4/5

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

With an output schema available and rich schema descriptions for most parameters, the description does not need to explain return values or every routing parameter. It is still fairly terse for a 9-parameter account/zone-routing tool, but the structured fields compensate for most of the remaining gaps.

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 78%, so most parameters are already documented in the schema. The description mentions the optional zone filter but adds no detail about search, pagination, accountId overrides, zoneOrId resolution, or context routing beyond what the schema provides.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Purpose4/5

Does the description clearly state what the tool does and how it differs from similar tools?

The description states a specific verb and resource ('List account Load Balancers') and names the returned fields, making the operation clear. It does not explicitly differentiate itself from close siblings such as cf_load_balancer_get or cf_lb_pools_list, so it falls short of a 5.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Usage Guidelines3/5

Does the description explain when to use this tool, when not to, or what alternatives exist?

It mentions an optional zone filter and the required permission, which gives some usage context. However, it does not say when to use this list tool instead of cf_load_balancer_get, cf_lb_pools_list, or cf_lb_monitors_list, nor does it state exclusions.

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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