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 retrieves ISO details if found, implying a read-only operation, but doesn't disclose behavioral traits like error handling (e.g., what happens if not found), authentication needs, rate limits, or response format. The description is minimal and lacks critical operational 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 front-loaded with the core purpose, followed by brief sections for Args and Returns. It's efficient with no wasted sentences, though the structure is minimal and could benefit from more detail without sacrificing conciseness.

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, read operation) and the presence of an output schema (which handles return values), the description is minimally adequate. However, with no annotations and 0% schema coverage, it lacks behavioral transparency and usage guidance, leaving gaps in overall completeness for effective agent use.

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 by explaining the 'name' parameter as 'ISO name or filename to search for,' adding semantic meaning beyond the schema's type definition. However, it doesn't provide format details (e.g., case sensitivity, wildcards) or examples. With one parameter and partial compensation, this meets the baseline for adequate but incomplete coverage.

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: 'Get ISO by name or filename.' It uses a specific verb ('Get') and resource ('ISO'), and explains the search criteria. However, it doesn't explicitly differentiate from sibling tools like 'get_iso' or 'list_isos' beyond the name-based search focus.

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. The description doesn't mention sibling tools like 'get_iso' (which might fetch by ID) or 'list_isos' (which might list all), nor does it specify prerequisites or exclusions. Usage is implied by the name-based search but not explicitly contextualized.

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