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montumodi

MongoDB Atlas MCP Server

by montumodi

custom_db_role_get

Retrieve a custom database role by name. Review role permissions and settings for database access management.

Instructions

Get a custom database role by name

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
rolenameYes
optionsNoOptional parameters
Behavior2/5

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

No annotations provided, and description gives no behavioral details beyond the basic action. Does not disclose error handling, permissions, or response format. Minimal transparency.

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?

Single sentence, no extraneous words, front-loaded with verb and resource. Efficient and clear.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Completeness3/5

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

Adequate for a simple retrieval tool but lacks details on error behavior and return format, especially without an output schema. Somewhat incomplete.

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?

Description adds meaning by specifying retrieval 'by name', but does not explain 'options' parameter. Schema description coverage is 50%, and description partially compensates with context for rolename.

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 clearly states action ('Get'), resource ('custom database role'), and retrieval method ('by name'), distinguishing it from sibling tools like create, delete, get_all, and update.

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 usage guidance provided. Does not specify when to use this tool vs alternatives like custom_db_role_get_all or when to use create/update. Lacks context for proper selection.

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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