Vultr MCP

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

No annotations are provided, so the description carries full burden. It mentions the tool lists connection pools but doesn't disclose important behavioral aspects: whether this is a read-only operation, what permissions are required, whether it returns all pools or paginated results, or what format the list takes. The description is minimal and lacks behavioral context.

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 concise with three sentences, but the structure could be improved. The purpose statement is clear, but the Args/Returns sections are redundant with the schema (though schema has 0% coverage). Every sentence serves a purpose, but the formatting as documentation rather than natural description reduces effectiveness.

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 no annotations, 0% schema coverage, and no output schema, the description is incomplete. It mentions what the tool does and the parameter but lacks crucial context: authentication requirements, rate limits, error conditions, return format details, or pagination behavior. For a tool that presumably returns a list of resources, this is inadequate.

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%, so the description must compensate. While it mentions 'database_id: The database ID or label', this adds minimal semantic value beyond what's implied by the parameter name. It doesn't explain what format the ID takes, where to find it, or what 'label' means in this context. With 0% schema coverage, this is insufficient.

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 ('List') and resource ('connection pools for a managed database'), providing a specific verb+resource combination. However, it doesn't distinguish this tool from similar list tools in the sibling set (like list_databases, list_connection_pools would need to specify it's for a specific database).

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. There's no mention of prerequisites, when this tool is appropriate versus other list tools, or any context about database state requirements. The sibling tools include 'get_connection_pool' (singular) but no comparison is made.

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