nzxplorer-mcp

get_kiwisaver_holdings

Read-onlyIdempotent

Get KiwiSaver fund holdings in an NZX company. Shows which KiwiSaver funds hold shares, their market value, and percentage of fund. Data covers Dec 2018 - Sep 2022.

Input Schema

TableJSON Schema

Name	Required	Description	Default
`date`	No	Specific quarter date (e.g. "2022-09-30")
`ticker`	Yes	NZX ticker symbol

Output Schema

TableJSON Schema

Name	Required	Description
`data`	Yes	The tool payload. Null when the call did not produce one — read meta.availability_status to find out why, and do not treat null as zero, empty or "none found".
`meta`	Yes
`tool`	Yes	Tool that produced this result.
`schema_version`	Yes	Envelope contract version. Bumps only on a breaking shape change.

Schema Changelog

Changes observed during successful MCP inspections.

Changed2 schema fields changedSep 16, 2026

addedInput schema / additionalProperties
```
Added value: +false
```

changedOutput schema / (root)

Previous value: -nullNew value: +{
+  "additionalProperties": false,
+  "properties": {
+    "data": {
+      "description": "The tool payload. Null when the call did not produce one — read meta.availability_status to find out why, and do not treat null as zero, empty or \"none found\"."
+    },
+    "meta": {
+      "additionalProperties": true,
+      "properties": {
+        "availability_status": {
+          "description": "ok: complete payload. truncated: payload exceeded the transport cap and was cut. parse_failed: payload is text this server could not parse as JSON. error: the tool raised.",
+          "enum": [
+            "ok",
+            "truncated",
+            "parse_failed",
+            "error"
+          ],
+          "type": "string"
+        },
+        "encoding": {
+          "description": "toon = pipe-delimited tabular encoding; header row names the columns.",
+          "enum": [
+            "json",
+            "toon"
+          ],
+          "type": "string"
+        },
+        "provenance": {
+          "description": "Whether the figures can cite a source document. \"undeclared\" means no claim has been made for this endpoint yet — it is not a claim that the data is unsourced.",
+          "enum": [
+            "direct",
+            "label",
+            "reachable",
+            "none",
+            "undeclared"
+          ],
+          "type": "string"
+        },
+        "retrieved_at": {
+          "description": "When this platform produced the answer — NOT the as-at date of the data.",
+          "format": "date-time",
+          "type": "string"
+        },
+        "warnings": {
+          "items": {
+            "type": "string"
+          },
+          "type": "array"
+        }
+      },
+      "required": [
+        "retrieved_at",
+        "availability_status",
+        "provenance"
+      ],
+      "type": "object"
+    },
+    "schema_version": {
+      "description": "Envelope contract version. Bumps only on a breaking shape change.",
+      "type": "string"
+    },
+    "tool": {
+      "description": "Tool that produced this result.",
+      "type": "string"
+    }
+  },
+  "required": [
+    "schema_version",
+    "tool",
+    "data",
+    "meta"
+  ],
+  "type": "object"
+}

First observedJun 12, 2026

TDQS

A3.9/5.0

Behavior4/5

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

Annotations already declare readOnlyHint, idempotentHint, and destructiveHint=false. The description adds valuable behavioral context beyond annotations: it specifies the output content (funds, market value, percentage) and the data coverage window (Dec 2018 - Sep 2022), which is a meaningful limitation. No contradiction with annotations.

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 two tight sentences with no fluff. It front-loads the core purpose, then adds output details and the date range. Every sentence earns its place.

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?

For a low-complexity tool with a full input schema, strong annotations, and an output schema, the description is complete. It covers what the tool returns and an important data availability limitation. Nothing critical is missing for an agent to invoke it correctly.

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 does not add much beyond the schema for the ticker and date parameters, but it does clarify the overall data scope and time coverage. Since the schema already documents each parameter, this is adequate.

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 a specific action ('Get KiwiSaver fund holdings') and resource ('an NZX company'), then specifies exactly what is shown: funds, market value, and percentage. This distinguishes it from sibling tools like get_shareholders or get_substantial_holders without needing to open schemas.

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?

There is no guidance on when to use this tool versus alternatives. It does not mention exclusions or conditions, such as when to prefer get_shareholders or get_substantial_holders. The date coverage is useful context but not usage direction.

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

All nzxplorer-mcp tools Inspect

Try in Browser

One endpoint for every MCP toolRayrun runs every MCP server behind one URL and holds the credentials. Each call is decided per client, tool, and argument, then recorded.ray.runAd

Glama MCP Gateway

Add one secure layer between your agents and this server.