Vultr MCP

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

With no annotations provided, the description carries full burden for behavioral disclosure. It states this is an update operation (implying mutation) and mentions identifier resolution, but lacks critical details: required permissions, whether changes are reversible, rate limits, error conditions, or what 'Success confirmation' entails. 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 efficiently structured with a purpose statement, identifier note, and clear Arg/Return sections. Each sentence adds value: the first states the action, the second clarifies identifier handling, and the bullet points document parameters and returns. It's appropriately sized for a simple update tool with minimal waste.

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 2 parameters with 0% schema coverage, no annotations, but an output schema exists, the description does an adequate but incomplete job. It covers parameter purposes and mentions a return type, but lacks behavioral context (permissions, side effects) and detailed parameter constraints. The output schema likely handles return values, but the description doesn't address mutation risks or usage context sufficiently.

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 explains both parameters: 'vpc2_identifier' accepts 'description or ID' with smart resolution, and 'description' is the 'new description'. This adds meaningful context beyond the bare schema types. However, it doesn't cover constraints like length limits, allowed characters, or ID formats, leaving some semantic gaps.

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: 'Update VPC 2.0 description' with the verb 'update' and resource 'VPC 2.0 description'. It distinguishes from siblings like 'create_vpc2' and 'delete_vpc2' by focusing on updating descriptions rather than creating or deleting VPCs. However, it doesn't explicitly differentiate from other update tools (e.g., 'update_user', 'update_record') beyond the resource specificity.

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 minimal guidance: it mentions 'Smart identifier resolution' for using description or ID, but offers no explicit when-to-use advice, prerequisites, or alternatives. There's no mention of when to choose this over other VPC-related tools or what conditions must be met before updating. The guidance is insufficient for informed tool selection.

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