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uarlouski

TestRail MCP Server

get_labels

Read-onlyIdempotent

Retrieve all test case labels for a project, returning label IDs and titles to use when creating or updating test cases.

Instructions

Get all available test case labels (sometimes called tags) for a project. Returns label IDs and titles that can be used when creating or updating test cases.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
project_idYesThe ID of the project to retrieve labels for
Behavior4/5

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

Annotations already declare readOnlyHint, destructiveHint, and idempotentHint, so the description does not need to repeat safety. It adds value by specifying return content (IDs and titles) and the alias 'tags', which is helpful. No contradictions.

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 long with no wasted words. The main action is front-loaded, and every sentence adds value.

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 simple, one-parameter, read-only tool with no output schema and full annotation coverage, the description is complete. It explains the return structure (IDs and titles) and use case, leaving no critical gaps.

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 coverage is 100%, with the parameter 'project_id' fully described in the schema. The description does not add further semantic details beyond what the schema provides, so a baseline score of 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?

The description clearly states the tool gets all available test case labels for a project, with a specific verb ('Get') and resource ('labels'). It also explains the output (IDs and titles) and usage context (when creating/updating test cases), distinguishing it from sibling 'get_*' tools.

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 when creating or updating test cases but does not explicitly state when to use this tool versus alternatives like get_case_fields or get_cases. No exclusions or when-not-to-use guidance is provided, which is a gap given the number of sibling tools.

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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