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artemkozlenkov

Azure Infrastructure MCP Server

list_role_definitions

List all available Azure role definitions, including built-in roles, to view permissions and roles for role-based access control.

Instructions

List available Azure role definitions (built-in roles).

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault

No arguments

Output Schema

TableJSON Schema
NameRequiredDescriptionDefault
resultYes
Behavior4/5

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

No annotations are provided, so the description carries full burden. It correctly characterizes a read-only, non-destructive listing operation. It could mention that it returns all built-in role definitions or any pagination behavior, but the current description is clear and sufficient for a simple no-parameter tool.

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?

A single, compact sentence that conveys the purpose without any fluff. Every word serves a purpose.

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?

The tool has no parameters and an output schema is present, so the description does not need to elaborate on return values. The description is complete enough for the agent to understand what the tool does.

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

Parameters4/5

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

There are no parameters, and schema description coverage is 100%. The description adds context by specifying 'built-in roles', but no parameter details are needed. Baseline for 0 parameters is 4.

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 verb 'List', the resource 'Azure role definitions', and specifies they are 'built-in roles'. It distinguishes from sibling tools like create_role_assignment and list_role_assignments_for_principal that deal with assignments, not definitions.

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?

No explicit guidance on when to use or when not, nor alternatives are mentioned. The context of sibling tools implicitly differentiates, but the description lacks explicit usage context. Given the simplicity of the tool, this is acceptable but not exemplary.

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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