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google-tag-manager-mcp

Gtm Client

gtm_client

Create, read, list, update, revert, or remove Google Tag Manager clients within a workspace. Deletion and revert require explicit confirmation.

Instructions

Manage GTM clients within a workspace. Same action set as gtm_tag (create, get, list, update, remove, revert; remove/revert require confirm=true).

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
pathNo
actionYes
configNo
paramsNo
parentNo
confirmNo

Output Schema

TableJSON Schema
NameRequiredDescriptionDefault

No arguments

Schema Changelog

Changes observed during successful MCP inspections.

  1. First observedv0.1.0

TDQS

B3.2/5.0
Behavior3/5

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

No annotations are provided, so the description carries the burden. It discloses a key behavioral detail: 'remove/revert require confirm=true'. However, it does not mention other potential side effects, permissions, or error behaviors. The confirmation requirement is useful but limited; other destructive actions (e.g., update) are not clarified.

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 sentences with no filler. It front-loads the resource and action set, then adds a critical behavioral note. Every element is purposeful and the length is appropriate.

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 complexity (6 params, no schema descriptions) and reliance on gtm_tag for action definitions, the description is incomplete. It omits parameter semantics, return value details, and does not fully explain invocation patterns. The reference to gtm_tag is indirect and may not be available to the agent without further lookup.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Parameters2/5

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

Schema description coverage is 0%, so the description must compensate. It only mentions the 'confirm' parameter and its requirement for remove/revert, but does not explain 'path', 'config', 'params', or 'parent'. The action list hints at usage but does not map parameters to actions. This is inadequate for a tool with six parameters.

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 'Manage GTM clients within a workspace' which is a clear verb and resource. It distinguishes from siblings by resource type (clients), but does not explicitly contrast with gtm_tag beyond referencing it. The action set is listed, giving a concrete idea of what operations are available.

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?

The description implies usage for client resources in a workspace, but does not explicitly state when to use this tool versus alternatives. It references gtm_tag as having the same action set, but does not provide conditions for choosing clients over tags or other resource types. No when-not-to-use guidance is given.

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