Vultr MCP

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

No annotations are provided, so the description carries full burden. It discloses that the tool returns 'detailed status including attachment, usage, and cost information', which adds behavioral context beyond basic retrieval. However, it doesn't mention permissions, rate limits, or error conditions, leaving gaps for a tool with no annotation coverage.

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 efficiently structured with a clear purpose statement, parameter guidance, and return information in three concise sentences. Each sentence adds value without redundancy, making it front-loaded and easy to parse.

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?

Given the tool has an output schema (which handles return values), no annotations, and a simple single parameter, the description provides adequate context: purpose, parameter semantics, and return content overview. It could improve by addressing permissions or error handling, but for a read-only status tool, it's largely complete.

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?

Schema description coverage is 0%, but the description compensates by explaining the 'volume_identifier' parameter as 'Volume label or ID' and noting 'Smart identifier resolution'. This adds meaningful semantics beyond the bare schema, clarifying acceptable input formats. With only one parameter, this is sufficient for a high score.

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 verb ('Get') and resource ('comprehensive status information for a block storage volume'), making the purpose specific and unambiguous. It distinguishes from sibling tools by focusing on volume status retrieval rather than creation, deletion, or other operations listed among siblings.

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 implies usage for retrieving status information about a volume, but provides no explicit guidance on when to use this tool versus alternatives (e.g., 'get' or 'list' tools for volumes). It mentions 'smart identifier resolution' which hints at context, but lacks clear when/when-not rules or named alternatives.

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