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 it's a creation tool, implying a write operation, but doesn't mention permissions required, whether it's idempotent, error conditions, or what happens if a rule already exists. This leaves significant gaps for a mutation tool.

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: a clear purpose statement followed by a bulleted list of parameters and a brief returns statement. Every sentence adds value without redundancy, making it easy to scan and understand.

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 creation tool with 5 parameters, no annotations, and no output schema, the description is minimally adequate. It covers the purpose and parameters well but lacks behavioral context, error handling, and output details. Given the complexity, it should provide more guidance on usage and outcomes.

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%, but the description compensates well by listing all 5 parameters with clear explanations of what each represents (e.g., 'load_balancer_id: The load balancer ID or label', 'frontend_protocol: Frontend protocol'). It adds meaningful context beyond the bare schema, though it doesn't specify format constraints like port ranges.

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 action ('Create') and resource ('forwarding rule for a load balancer'), making the purpose unambiguous. It distinguishes from sibling tools like 'configure_basic_web_lb' or 'create_rule' by specifying the exact resource type, though it doesn't explicitly contrast with them.

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?

No guidance is provided on when to use this tool versus alternatives like 'configure_basic_web_lb' or 'create_rule', nor does it mention prerequisites, dependencies, or typical use cases. The description assumes the user knows when forwarding rules are needed.

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