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 states it 'Get[s] information' but doesn't disclose behavioral traits like whether this is a read-only operation (implied but not stated), authentication requirements, rate limits, error conditions, or what happens if the group doesn't exist. For a tool with zero annotation coverage, this leaves significant gaps in understanding its behavior.

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 with the core purpose in the first sentence. The Args and Returns sections are structured clearly. Every sentence adds value, with no wasted words, though it could be slightly more concise by integrating the parameter explanation into the main description.

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 (single parameter, no nested objects) and the presence of an output schema (which handles return values), the description is reasonably complete. It covers the purpose, parameter semantics, and return intent. However, it lacks behavioral context (e.g., error handling) which would be beneficial despite the output schema.

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. It adds valuable semantics: it explains that 'firewall_group_id' can be either an ID or description, providing examples ('web-servers' or UUID). This clarifies parameter usage beyond the bare schema. However, it doesn't detail format constraints or validation rules.

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 verb ('Get') and resource ('information about a specific firewall group'), making the purpose explicit. It distinguishes this from siblings like 'list_groups' (which likely lists multiple groups) by specifying retrieval of a single group. However, it doesn't explicitly contrast with other get_* tools for different resources.

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 when you need information about a specific firewall group, given the parameter requirement. It doesn't explicitly state when NOT to use it (e.g., vs 'list_groups' for multiple groups) or name alternatives, leaving some inference needed. The context is clear but lacks explicit exclusions.

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