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 states the action ('Start migrating') and a return value ('Status message confirming migration start'), but lacks critical details such as whether this is a long-running operation, if it requires specific permissions, potential side effects (e.g., data overwriting), or error handling. This is inadequate for a complex migration tool.

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 with a clear purpose statement followed by parameter and return sections. It's appropriately sized for a 7-parameter tool, though the 'Args' and 'Returns' labels are slightly redundant given the schema. Every sentence adds value, with no fluff.

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 complexity (7 parameters, no annotations, no output schema), the description is partially complete. It covers parameters adequately but lacks behavioral context (e.g., execution model, error cases) and relies on the return statement without detailing the status message format. It's minimally viable but has clear gaps for a migration operation.

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?

The description includes an 'Args' section that lists and briefly describes all 7 parameters, adding meaningful context beyond the schema (which has 0% description coverage). It clarifies roles like 'destination database ID' vs. 'source database' details, though it doesn't specify formats (e.g., for database_id) or constraints (e.g., port range). This compensates well for the low schema 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 with a specific verb ('Start migrating') and resource ('data from an external database'). It distinguishes from siblings like 'stop_migration' and 'get_migration_status' by focusing on initiation, though it doesn't explicitly contrast with other migration-related tools in the sibling list.

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 no guidance on when to use this tool versus alternatives. It doesn't mention prerequisites (e.g., needing a destination database setup), exclusions (e.g., not for ongoing migrations), or refer to sibling tools like 'stop_migration' or 'get_migration_status' for context.

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