list_plans

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 implies a safe, read-only operation by stating 'List all available VPS plans'. No behavioral traits (e.g., rate limits, auth needs) are disclosed, but for a simple list operation, this is sufficient.

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 a single sentence with no wasted words. Every element ('List all available VPS plans with pricing, specs, and UUIDs') is essential and informative.

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 simplicity (zero parameters, no annotations, but an output schema exists), the description is complete. It tells the agent what the tool does and what it returns, without needing to explain return values due to the output schema.

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 input schema is empty (0 parameters), so there are no parameters to describe. Schema coverage is 100%. The description does not add parameter info beyond what the schema provides, but the baseline for 0 parameters is 4.

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 verb 'List', the resource 'all available VPS plans', and the return content 'with pricing, specs, and UUIDs'. It distinguishes from sibling tools like list_servers, list_locations, and list_operating_systems, which deal with different entities.

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 when to use the tool (when the agent needs VPS plans) but does not explicitly state when not to use it or provide alternatives. The purpose is straightforward, so the implied usage is adequate but lacks explicit guidance.

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