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 retrieves 'detailed information' and supports 'smart identifier resolution' (label or UUID), adding useful context beyond basic read operations. However, it lacks details on permissions, rate limits, error handling, or what 'detailed information' includes (e.g., configuration, status as noted). This is a moderate disclosure but misses key behavioral traits for a tool with no annotations.

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 note on identifier resolution and a structured breakdown of args and returns. Every sentence adds value, with no wasted words. However, the 'Args' and 'Returns' sections could be integrated more fluidly, and it's slightly verbose for a simple tool.

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 low complexity (1 parameter, no output schema, no annotations), the description is somewhat complete but has gaps. It explains the parameter and return intent ('detailed information including configuration and status'), but without an output schema, it doesn't specify the return structure or data types. For a read-only tool with no annotations, more behavioral context (e.g., error cases, auth needs) would enhance completeness.

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 input schema has 1 parameter with 0% description coverage, so the description must compensate. It adds meaning by explaining 'cluster_identifier' as 'The cluster label or ID (e.g., "production-cluster" or UUID)' and notes 'Smart identifier resolution,' clarifying usage beyond the schema's basic string type. This effectively covers the single parameter, though it doesn't detail format constraints or examples beyond the brief mention.

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 tool's purpose: 'Get detailed information about a specific Kubernetes cluster.' It specifies the verb ('Get') and resource ('Kubernetes cluster'), and distinguishes it from siblings like 'list_kubernetes_clusters' (which lists multiple clusters) and 'get_kubernetes_cluster_status' (which focuses on status only). However, it doesn't explicitly differentiate from all siblings, such as 'get_kubernetes_cluster_config' or 'get_kubernetes_cluster_resources', which might overlap in scope.

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 by specifying 'specific Kubernetes cluster' and 'use cluster label or UUID,' suggesting it's for retrieving details of a known cluster. It doesn't explicitly state when to use it versus alternatives like 'list_kubernetes_clusters' for multiple clusters or other get_kubernetes_* tools for specific aspects. No exclusions or prerequisites are mentioned, leaving some ambiguity for the agent.

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