Vultr MCP

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

With no annotations provided, the description carries full burden for behavioral disclosure. It states this is a list operation (implying read-only), but doesn't mention whether it requires specific permissions, has rate limits, returns paginated results, or what format the version list takes. The description provides basic intent but lacks operational details needed for safe invocation.

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 efficiently structured with a clear purpose statement followed by Args and Returns sections. Each sentence serves a distinct purpose. However, the 'Returns' section could be more specific about the list format rather than just stating 'List of available versions for upgrade.'

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 tool with no annotations, 0% schema description coverage, and no output schema, the description is insufficient. It covers basic purpose and parameter identity but lacks critical details about authentication requirements, error conditions, response format, pagination, and how the version information should be interpreted for upgrade decisions.

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 description mentions the single parameter ('database_id: The database ID or label'), which matches the input schema. With 0% schema description coverage, this adds some value by clarifying the parameter accepts either ID or label. However, it doesn't explain format expectations, validation rules, or provide examples, leaving significant gaps in parameter understanding.

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 with a specific verb ('List') and resource ('available versions for database engine upgrades'). It distinguishes this as a version listing tool rather than a general database information tool. However, it doesn't explicitly differentiate from potential sibling tools like 'get_kubernetes_available_upgrades' or other upgrade-related tools.

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 minimal usage guidance. It mentions the tool is for listing upgrade versions, but doesn't specify when to use it versus alternatives like checking current versions or initiating upgrades. No prerequisites, exclusions, or comparison to sibling tools are provided.

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