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 mentions the return type ('List of one-click application objects') which is helpful, but doesn't address important behavioral aspects like pagination, rate limits, authentication requirements, or whether this is a read-only operation. The description is minimal and leaves key behavioral questions unanswered.

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 extremely concise with just two sentences. The first sentence states the purpose, the second describes the return value. There's no wasted text, though some might argue it's too brief given the lack of behavioral context.

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 list tool with no annotations and no output schema, the description is insufficient. While it states what the tool does and what it returns, it doesn't provide enough context about the nature of 'one-click applications' versus other application types, doesn't explain the structure of returned objects, and doesn't address common list operation concerns like filtering, sorting, or pagination.

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 tool has 0 parameters with 100% schema description coverage, so the baseline is 4. The description doesn't need to explain parameters, and it doesn't introduce any parameter-related confusion. The schema fully documents the empty parameter set.

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 states the tool lists one-click applications, which is a clear verb+resource combination. However, it doesn't distinguish this from sibling tools like 'list_applications' or 'list_marketplace_applications' - the 'only' modifier is vague about what makes one-click applications different from other application types.

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. With many sibling list tools (list_applications, list_marketplace_applications, search_applications), there's no indication of when this specific tool is appropriate versus those other options.

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