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

With no annotations supplied, the description carries the burden of behavioral disclosure. It helpfully states that missing inputs fall back to documented defaults and lists the calculator's components, but it does not mention whether the tool has side effects, what its output looks like, or any prerequisites.

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 short and starts with the main action, but it contains an obvious redundancy ('calculator calculator') and presents the cost components as a run-on list. It would be cleaner and more readable as a structured breakdown.

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?

For a tool with 6 parameters, no output schema, and no annotations, the description provides core calculation context and a useful default-behavior note. However, it omits any statement of the return value and does not clarify potentially ambiguous parameters such as route or spouse string format.

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 100% and every parameter already has a description and default, so the schema handles most parameter meaning. The description adds meaningful value by specifying that adult dependant fees are €7,500 each, which is not stated in the adultDependants parameter description.

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 names a specific action ('Run') and a specific resource ('Malta MPRP cost calculator') and enumerates the cost components, so an agent can tell this is a calculation tool rather than a describe tool. It does not explicitly distinguish it from sibling tools like calculator_describe, though 'Run' implies execution.

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?

There is no guidance about when to use this tool versus alternatives such as calculator_describe or submit_enquiry. The imperative 'Run' implies a use case, but no conditions, exclusions, or alternative-selection cues are provided.

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