Ludus FastMCP

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 states the tool returns 'Recovery recommendations based on failure analysis', which hints at read-only behavior but lacks critical details: it doesn't specify if this tool performs analysis itself or retrieves pre-computed results, what data sources it uses, potential side effects (e.g., logging), or error handling. For a tool with no annotations, this is insufficient to inform safe and effective use.

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 appropriately concise with two sentences: the first states the purpose, and the second outlines parameters and returns. It's front-loaded with the core functionality. However, the 'Args' and 'Returns' sections are somewhat redundant with the schema and output schema, and the structure could be more integrated (e.g., combining purpose and usage).

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 moderate complexity (analysis of failed deployments), no annotations, and an output schema (which handles return values), the description is minimally adequate. It covers the purpose and a parameter note, but lacks behavioral context (e.g., how recommendations are generated), usage guidelines, and integration with sibling tools. The output schema reduces the need to detail returns, but more guidance on when and how to use this tool would improve completeness.

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 schema provides no parameter descriptions. The description adds minimal value: it notes 'user_id: Optional user ID (admin only)', which clarifies the parameter's purpose and access restriction. However, it doesn't explain the parameter's impact (e.g., whether it filters recommendations by user or changes output format) or provide examples. With one parameter and low schema coverage, this partial compensation justifies a baseline 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's purpose: 'Get recovery recommendations for failed deployments.' It specifies the verb ('Get') and resource ('recovery recommendations'), and the context ('for failed deployments') helps distinguish it from general diagnostic tools. However, it doesn't explicitly differentiate from sibling tools like 'diagnose_network_issues' or 'get_deployment_status', which might also provide failure-related insights.

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 implies usage when deployments fail, but offers no explicit when-to-use criteria, prerequisites (e.g., after a deployment failure is detected), or alternatives. For example, it doesn't clarify if this should be used instead of or in conjunction with tools like 'get_deployment_status' or 'diagnose_network_issues'. The 'admin only' note for user_id is a parameter detail, not a usage guideline.

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