Vultr MCP

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

With no annotations provided, the description carries the full burden of behavioral disclosure. While it correctly indicates this is a destructive operation ('Delete'), it fails to mention critical behavioral aspects such as whether deletion is permanent, requires admin permissions, affects associated resources, or has rate limits. This is a significant gap for a destructive tool.

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

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

The description is well-structured and concise, with a clear purpose statement followed by brief sections for arguments and returns. Every sentence serves a functional purpose, though the 'Args' and 'Returns' labels could be slightly more integrated into the flow.

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

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

For a destructive tool with no annotations, 0% schema description coverage, and no output schema (though 'Returns' is mentioned), the description is incomplete. It lacks essential context about safety, permissions, side effects, and error handling, making it inadequate for reliable agent use despite its conciseness.

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

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

The description adds minimal semantic value beyond the input schema. It specifies that 'user_id' can be a UUID or email address, which isn't captured in the schema (0% coverage), but this is a basic clarification. With only one parameter and low schema coverage, the description doesn't fully compensate by explaining format constraints or validation rules.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Does the description clearly state what the tool does and how it differs from similar tools?

The description clearly states the tool's purpose with a specific verb ('Delete') and resource ('a user'), making it immediately understandable. However, it doesn't distinguish this from the sibling 'delete_user' tool, which appears to serve a similar function, preventing a perfect score.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Does the description explain when to use this tool, when not to, or what alternatives exist?

The description provides no guidance on when to use this tool versus alternatives like 'delete_user' or other deletion tools in the sibling list. It lacks context about prerequisites, permissions needed, or any 'when-not-to-use' warnings, leaving the agent with insufficient usage direction.

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