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by io.opsphere.mcp-cursor
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Cloudflare: WAF custom rules list

cf_waf_custom_rules_list
Read-only

List WAF custom rules for a zone (phase http_request_firewall_custom). Returns rule id, description, expression, action, enabled, and order. Requires CLOUDFLARE_API_TOKEN with Zone > Firewall Services > Read.

Input Schema

NameRequiredDescriptionDefault
zoneYesZone name (e.g. your-tenant.com) or zone 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. Changed25 schema fields changed
    • changedOutput schema / properties / data / additionalProperties
      Previous value: -trueNew value: +false
    • removedOutput schema / properties / data / properties / count
      Removed value: -{
-  "type": "number"
-}
    • addedOutput schema / properties / data / properties / description
      Added value: +{
+  "type": "string"
+}
    • removedOutput schema / properties / data / properties / errors / items / $ref
      Removed value: -"#/properties/data/properties/result/anyOf/0/items"
    • addedOutput schema / properties / data / properties / errors / items / additionalProperties
      Added value: +false
    • addedOutput schema / properties / data / properties / errors / items / properties
      Added value: +{
+  "code": {
+    "type": "integer"
+  },
+  "message": {
+    "type": "string"
+  }
+}
    • addedOutput schema / properties / data / properties / errors / items / required
      Added value: +[
+  "message"
+]
    • addedOutput schema / properties / data / properties / errors / items / type
      Added value: +"object"
    • addedOutput schema / properties / data / properties / gaps
      Added value: +{
+  "items": {
+    "type": "string"
+  },
+  "type": "array"
+}
    • addedOutput schema / properties / data / properties / id
      Added value: +{
+  "type": "string"
+}
    • removedOutput schema / properties / data / properties / items
      Removed value: -{
-  "$ref": "#/properties/data/properties/result/anyOf/0"
-}
    • addedOutput schema / properties / data / properties / lastUpdated
      Added value: +{
+  "format": "date-time",
+  "type": "string"
+}
    • removedOutput schema / properties / data / properties / messages
      Removed value: -{
-  "items": {
-    "anyOf": [
-      {
-        "type": "string"
-      },
-      {
-        "$ref": "#/properties/data/properties/result/anyOf/0/items"
-      }
-    ]
-  },
-  "type": "array"
-}
    • addedOutput schema / properties / data / properties / name
      Added value: +{
+  "type": "string"
+}
    • addedOutput schema / properties / data / properties / partial
      Added value: +{
+  "type": "boolean"
+}
    • addedOutput schema / properties / data / properties / phase
      Added value: +{
+  "type": "string"
+}
    • removedOutput schema / properties / data / properties / result
      Removed value: -{
-  "anyOf": [
-    {
-      "items": {
-        "additionalProperties": true,
-        "properties": {},
-        "type": "object"
-      },
-      "type": "array"
-    },
-    {
-      "$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"
-}
    • addedOutput schema / properties / data / properties / rules
      Added value: +{
+  "items": {
+    "additionalProperties": false,
+    "properties": {
+      "action": {
+        "type": "string"
+      },
+      "childRulesetId": {
+        "type": "string"
+      },
+      "description": {
+        "type": "string"
+      },
+      "enabled": {
+        "type": "boolean"
+      },
+      "expression": {
+        "type": "string"
+      },
+      "id": {
+        "type": "string"
+      },
+      "ref": {
+        "type": "string"
+      }
+    },
+    "required": [
+      "id",
+      "enabled"
+    ],
+    "type": "object"
+  },
+  "type": "array"
+}
    • addedOutput schema / properties / data / properties / truncated
      Added value: +{
+  "type": "boolean"
+}
    • addedOutput schema / properties / data / properties / version
      Added value: +{
+  "type": "string"
+}
    • addedOutput schema / properties / data / properties / warnings
      Added value: +{
+  "items": {
+    "type": "string"
+  },
+  "type": "array"
+}
    • addedOutput schema / properties / data / required
      Added value: +[
+  "rules",
+  "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

A4.3/5.0
Behavior4/5

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

Annotations already declare readOnlyHint=true, destructiveHint=false, and openWorldHint=false. The description adds useful behavioral context beyond annotations: the required CLOUDFLARE_API_TOKEN permission and the returned rule fields. It omits pagination/rate-limit behavior, which is a minor gap for a list tool.

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?

Three tight sentences, front-loaded with the core action and scope, then return fields, then authentication requirement. Every sentence carries useful information with no filler.

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

Completeness5/5

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

Given full schema coverage, an output schema, and annotations covering safety, the description supplies the remaining needed context: phase, authentication scope, and what is returned. Nothing essential for correct invocation is missing.

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 schema already documents zone, context_id, account_slug, and environment_slug. The description only mentions the zone and returned fields, adding no parameter semantics beyond the schema; baseline 3 is appropriate.

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?

States a specific verb and resource: 'List WAF custom rules for a zone', and names the exact ruleset phase. This clearly distinguishes it from the sibling write tool cf_waf_custom_rules_replace and from other Cloudflare list tools.

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

Usage Guidelines4/5

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

Gives clear context: listing rules for a zone in the http_request_firewall_custom phase, plus the required API token permission. It does not explicitly name alternatives or state when not to use it, but the read-only listing scope is easy to infer against the replace sibling.

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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