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 states the action is 'Delete' and mentions 'Success message' as a return, but fails to disclose critical traits like whether deletion is irreversible, requires specific permissions, has side effects on related resources, or involves rate limits. This is a significant gap for a destructive operation.

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 front-loaded with the core purpose, followed by structured sections for Args and Returns, making it efficient and easy to parse. Every sentence adds value without redundancy. A slight improvement could be integrating the smart resolution note more seamlessly, but overall it's well-structured.

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 destructive nature, no annotations, no output schema, and a single parameter with low schema coverage, the description is incomplete. It lacks details on behavioral risks, error conditions, or what 'Success message' entails, which are crucial for safe invocation. More context is needed to adequately guide an agent.

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 schema has 0% description coverage for its single parameter, but the description compensates by explaining 'zone_identifier' as 'The CDN zone origin domain, CDN domain, or ID to delete' and adds 'Smart identifier resolution' context. This provides meaningful semantics beyond the bare schema, though it could detail format constraints or examples for higher clarity.

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 ('Delete') and resource ('a CDN zone'), making the purpose unambiguous. It distinguishes from siblings like 'purge_cdn_zone' by focusing on deletion rather than cache purging. However, it doesn't explicitly contrast with other deletion tools like 'delete_domain' or 'delete_record', keeping it from 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 implies usage through 'Smart identifier resolution' for the zone_identifier, suggesting when to use this tool based on available identifiers. However, it lacks explicit guidance on when to choose this over alternatives like 'purge_cdn_zone' or prerequisites such as confirmation steps, leaving room for improvement.

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