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. While it mentions 'Smart identifier resolution' for gateway identification, it doesn't address important behavioral aspects like whether this is a read-only operation, what permissions are required, whether it makes external API calls, or how projections are calculated. The description provides minimal behavioral context beyond basic functionality.

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 three clear sections: purpose statement, identifier guidance, and return value. Each sentence serves a distinct purpose with minimal redundancy. The information is front-loaded with the core functionality stated first.

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, no output schema, and 0% schema description coverage, the description is inadequate. It doesn't explain what 'detailed cost analysis and projections' includes, how data is formatted, whether there are rate limits, authentication requirements, or error conditions. The description leaves too many contextual questions unanswered for proper tool invocation.

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 adds meaningful context about the single parameter ('gateway_identifier') by explaining that it accepts 'Gateway label or ID' and mentioning 'Smart identifier resolution.' However, with 0% schema description coverage, it doesn't fully compensate by providing format examples, length constraints, or validation rules. The parameter information is helpful but incomplete.

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 ('Get') and resource ('cost analysis and projections for a storage gateway'), making it immediately understandable. However, it doesn't explicitly differentiate from sibling tools like 'analyze_costs' or 'get_cost_breakdown_by_service', which appear related but have different scopes.

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. With multiple sibling tools related to cost analysis (analyze_costs, analyze_spending_trends, get_cost_breakdown_by_service), there's no indication of when this specific gateway-focused analysis is appropriate versus broader cost tools.

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