Vultr MCP

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

No annotations are provided, so the description carries the full burden. It discloses that the tool returns a 'comprehensive summary' including configuration, stats, and SSL info, which adds behavioral context. However, it lacks details on permissions, rate limits, or error handling. The description does not contradict any annotations, as there are none.

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 appropriately sized and front-loaded: the first sentence states the purpose clearly, followed by a brief note on identifier resolution, and then structured sections for Args and Returns. Every sentence earns its place with no wasted words, making it efficient 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's moderate complexity (single parameter, no output schema, no annotations), the description is fairly complete. It covers purpose, parameter semantics, and return content. However, it lacks details on behavioral aspects like authentication or error cases, which would be beneficial for a read operation in a server with many siblings.

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%, so the description must compensate. It adds significant meaning by explaining that 'zone_identifier' accepts 'origin domain, CDN domain, or UUID' and mentions 'Smart identifier resolution', which clarifies the parameter's semantics beyond the basic schema. This effectively documents the single parameter, though it could specify format examples or constraints.

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 summary of a CDN zone', making the purpose specific. It distinguishes from siblings like 'get_cdn_zone' (likely more basic) and 'get_cdn_zone_stats' (stats-only) by emphasizing 'comprehensive' coverage including configuration, stats, and SSL info.

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 clear context for when to use this tool: to obtain a comprehensive CDN zone summary. It mentions 'Smart identifier resolution' for the parameter, which is helpful guidance. However, it does not explicitly state when not to use it or name alternatives among siblings, such as 'get_cdn_zone' or 'get_cdn_zone_stats', which could be more specific options.

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