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wpxmcp

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TypeScript
Hybrid

List registered field groups

list_field_groups
Read-only

Lists editable field groups on a WordPress site with their fields and locations. Use it before registering a group to extend an existing one and avoid duplicates.

Instructions

List the editable field groups registered on the site, with their fields and where each appears. Check here before registering a group so you extend an existing one rather than duplicating it.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
site_idNoWhich configured WordPress site to act on. Optional — with a single site configured it is used automatically; with several, the default site is used unless you name one. Run list_sites for valid ids.

Schema Changelog

Changes observed during successful MCP inspections.

  1. Changed2 schema fields changedv2.0.0
    • changedInput schema / $schema
      Previous value: -"http://json-schema.org/draft-07/schema#"New value: +"https://json-schema.org/draft/2020-12/schema"
    • removedInput schema / additionalProperties
      Removed value: -false
  2. First observedv1.0.0

TDQS

A4.3/5.0
Behavior4/5

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

Annotations already mark it read-only and non-destructive, so the description does not need to repeat safety. It adds that only editable groups are returned and that each entry includes its fields and appearance locations, which is useful behavioral content beyond the title. 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?

Two sentences, both purposeful: the first front-loads exactly what the tool returns, and the second gives the operational use case. No filler or repetition.

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 read-only list tool with one optional, well-documented parameter and no output schema, the description states the result contents (fields and appearance) and the context in which the agent should call it. Nothing essential 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% and the optional site_id parameter is already documented with default behavior and pointer to list_sites. The description adds no parameter-specific meaning, so baseline 3 applies.

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 names a clear verb-noun pair ('List ... field groups') and narrows scope to editable, registered groups, including what each contains (fields and appearance locations). This distinguishes it from register_fields and delete_field_group without opening schemas.

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 explicit timing: check this before registering a group, to extend an existing group rather than duplicate it. It does not name the counterpart tool (register_fields) or state when not to use it, but the usage context is unambiguous.

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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