Ludus FastMCP

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

With no annotations provided, the description carries full burden. It discloses key behaviors: automatic fetching of latest ISO/checksum from a specific URL, weekly updates, and template creation. However, it doesn't cover permissions needed, whether it's idempotent, error handling, or rate limits. It adds value but isn't comprehensive for a creation 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?

Well-structured with purpose upfront, followed by detailed args and returns sections, and an example. Some sentences could be tighter (e.g., the ISO URL explanation is slightly verbose), but overall it's efficient and front-loaded with key information.

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 7 parameters, 0% schema coverage, no annotations, and no output schema, the description does a decent job covering inputs and high-level behavior. However, it lacks details on output structure, error cases, and operational constraints, making it incomplete for a creation tool in this context.

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 provides clear semantics for all 7 parameters with examples and defaults, adding meaning beyond the bare schema. However, it doesn't explain constraints (e.g., valid disk_size formats) or dependencies between parameters, keeping it from a perfect score.

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 creates a Kali Linux weekly template with automatic ISO detection, specifying the verb ('create'), resource ('Kali Linux weekly template'), and key functionality ('automatic latest ISO detection'). It distinguishes from sibling tools like 'create_custom_os_template' or 'create_custom_template' by focusing on Kali-specific weekly updates.

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 for creating Kali templates with latest ISOs but doesn't explicitly state when to use this vs. alternatives like 'create_custom_os_template' or 'build_template'. It mentions the ISO URL changes weekly, suggesting timeliness, but lacks explicit when-not-to-use guidance or prerequisites.

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