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 mentions 'smart identifier resolution' and a success confirmation return, but fails to disclose critical traits: whether this is a destructive/mutative operation (implied by 'detach' but not stated), permission requirements, potential side effects (e.g., network disruption), rate limits, or error conditions. This leaves significant gaps for safe agent invocation.

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 well-structured and appropriately sized: it starts with a clear purpose statement, followed by a note on identifier resolution, and then lists args and returns in a bullet-like format. Every sentence adds value, with no redundant information. However, the 'Args:' and 'Returns:' sections could be integrated more seamlessly into prose.

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 moderate complexity (a mutative operation with 3 parameters), no annotations, and an output schema (implied by 'Returns: Success confirmation'), the description is partially complete. It covers parameters well but lacks behavioral context (e.g., safety, permissions) and doesn't elaborate on the output schema's details. For a detach operation, more guidance on implications is needed.

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 meaningful context beyond the bare schema: it explains that 'vpc_identifier' and 'instance_identifier' accept descriptions, labels, hostnames, or IDs, and clarifies 'vpc_type' as 'vpc' or 'vpc2' with a default. This covers all three parameters effectively, though it doesn't detail format constraints (e.g., ID patterns).

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 with a specific verb ('detach') and resources ('VPC or VPC 2.0 from an instance'), making it immediately understandable. However, it doesn't explicitly differentiate from sibling tools like 'detach' (which might be a generic version) or 'attach_to_instance' (the inverse operation), though the name itself suggests specialization.

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 by mentioning 'smart identifier resolution' for VPCs and instances, suggesting it should be used when you have identifiers like descriptions, labels, hostnames, or IDs. However, it lacks explicit guidance on when to choose this tool over alternatives (e.g., vs. 'detach' or other network management tools) or any prerequisites or exclusions.

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