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. It implies a mutation operation ('Update') but fails to detail critical aspects like required permissions, whether changes are reversible, rate limits, or error handling. The mention of 'Returns: Updated CDN zone details' hints at output but lacks specifics, leaving significant gaps in transparency.

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 with a clear purpose statement, parameter list, and return note, all in a compact format. However, the parameter explanations are somewhat terse (e.g., 'block_ai_bots: Block AI/crawler bots'), which, while efficient, could benefit from slightly more detail to improve clarity without sacrificing brevity.

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 mutation tool with 7 parameters, no annotations, and no output schema, the description is minimally adequate. It covers the basic purpose and parameters but lacks depth in behavioral context, error handling, and output details. Given the complexity, it should provide more guidance on usage and implications to be fully 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?

Given 0% schema description coverage, the description compensates well by listing all 7 parameters with brief explanations (e.g., 'cors_policy: CORS policy configuration'). This adds meaningful context beyond the bare schema, though it could be enhanced with examples or format details. The baseline is elevated due to the low schema coverage and the description's effort to document parameters.

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 'Update' and the resource 'CDN zone configuration,' making the purpose specific and understandable. However, it does not explicitly differentiate from sibling tools like 'create_cdn_zone' or 'get_cdn_zone,' which are present in the list, leaving room for potential confusion in tool selection.

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, such as 'create_cdn_zone' for initial setup or 'get_cdn_zone' for retrieval. It mentions 'Smart identifier resolution' but does not clarify prerequisites, dependencies, or exclusion scenarios, offering minimal usage context.

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