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Kyze-Labs

Damn Vulnerable MCP Server (DVMCP)

by Kyze-Labs

it.manage_users

Manage user accounts in the NovaTech identity system by creating, updating, disabling, or listing users with specified roles and permissions.

Instructions

Create, update, or disable user accounts in the NovaTech identity system. Supports creating new accounts with specified roles and permissions.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
actionYesAction to perform
usernameNoUsername for the account
roleNoAccount role
permissionsNoJSON permissions blob
Behavior2/5

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

Description claims the tool handles create, update, and disable but ignores the 'list' action. No disclosure of behavioral traits like permissions needed or side effects. Without annotations, the description bears full burden but is incomplete.

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?

Two sentences, front-loaded with actions, but second sentence is redundant with schema. Could be more concise by removing tautology.

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 4 parameters and no output schema, description lacks behavior details for each action (e.g., what 'list' returns). Missing coverage of all schema actions reduces completeness.

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%, so parameters are documented. Description adds only that creating supports roles/permissions, which is already in schema. No additional context on formats or constraints.

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?

Description specifies 'Create, update, or disable user accounts' which clearly identifies the resource and actions. However, it omits the 'list' action present in the schema, reducing clarity slightly.

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 on when to use this tool versus siblings like 'it.execute_admin_command' or 'it.query_audit_log'. No prerequisites or alternative tools mentioned.

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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