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iXanadu

gmail-mcp

by iXanadu

labels_create

Create a new Gmail label for a specified account, enabling organized email categorization and filtering.

Instructions

Create a user label.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
nameYes
accountYes

Output Schema

TableJSON Schema
NameRequiredDescriptionDefault
resultYes

Schema Changelog

Changes observed during successful MCP inspections.

  1. First observedv0.1.0

TDQS

C2.4/5.0
Behavior2/5

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

With no annotations, the description carries the full behavioral disclosure burden, but it only states that a label is created. It does not disclose side effects, naming constraints, authorization needs, or behavior when a label with the same name already exists.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Conciseness3/5

Is the description appropriately sized, front-loaded, and free of redundancy?

The description is compact and front-loaded with the core action, with no wasted words. However, it is so terse that it borders on under-specification rather than effective conciseness.

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?

For a tool with two required but undocumented parameters and no annotation context, the description omits too much for reliable invocation. The output schema exists, but the input semantics and usage context are not covered, leaving the agent to guess.

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

Parameters1/5

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

Schema description coverage is 0%, and the description does not explain the meaning, format, or constraints of 'account' or 'name.' An agent cannot determine what values are valid or how the two parameters relate to creating a user label.

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 uses the specific verb 'Create' with the resource 'a user label,' clearly indicating the operation. It is distinguishable from siblings like labels_list (listing) and label/unlabel (applying/removing labels), though it does not explicitly call out those distinctions.

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?

No guidance is provided on when to call labels_create instead of labels_list, label, or other label-related tools. There is no mention of prerequisites, such as an existing account, or whether duplicate label names should be checked first.

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