Vultr MCP

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

No annotations are provided, so the description carries the full burden. It states the tool performs an addition but lacks details on permissions required, whether the change is reversible, rate limits, or error conditions. For a mutation tool with zero annotation coverage, this leaves significant behavioral gaps.

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, followed by structured sections for args and returns. Every sentence adds value, though the 'Returns' section could be more specific (e.g., confirming what was added) rather than generic.

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 mutation tool with no annotations and no output schema, the description covers parameters well but lacks behavioral context (e.g., side effects, permissions). It is partially complete but misses critical details needed for safe and effective use, given the tool's complexity and lack of structured metadata.

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?

With 0% schema description coverage, the description fully compensates by explaining all three parameters: 'user_id' (UUID or email), 'subnet' (IP address or subnet with examples), and 'subnet_size' (subnet size with examples). It adds essential meaning beyond the bare schema, making parameters understandable.

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 specific action ('Add an IP address or subnet') and resource ('to a user's whitelist'), distinguishing it from sibling tools like 'remove_ip_whitelist_entry' and 'get_ip_whitelist'. It precisely communicates the tool's function without being tautological.

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 for adding entries to a whitelist but does not explicitly state when to use this tool versus alternatives like 'remove_ip_whitelist_entry' or 'get_ip_whitelist'. No exclusions or prerequisites are mentioned, leaving usage context partially inferred rather than clearly defined.

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