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 mentions 'admin only' for user_id, which hints at permission requirements, but doesn't disclose other behavioral traits such as whether this is a read-only operation, potential rate limits, error handling, or the format of the returned information. The description is minimal and lacks depth for a tool that likely involves sensitive data access.

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 concise and well-structured with clear sections for 'Args' and 'Returns,' making it easy to scan. It avoids unnecessary verbosity, though the content is somewhat sparse, which limits its helpfulness but doesn't detract from its structural efficiency.

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 complexity of resource management and the lack of annotations and output schema, the description is incomplete. It doesn't explain what 'resource quotas and usage information' entails, such as data format, scope, or potential limitations. For a tool that could involve detailed metrics, this leaves significant gaps for an AI agent to understand its full 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?

The schema description coverage is 0%, but the description adds some semantics by explaining that user_id is 'Optional user ID (admin only).' This clarifies the parameter's purpose and constraints. However, with only one parameter and no additional details like format or examples, it partially compensates but doesn't fully address the coverage gap.

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 'Get resource quotas and current usage,' which is a specific verb+resource combination. However, it doesn't explicitly differentiate from sibling tools like 'get_range_metrics' or 'get_deployment_metrics' that might also provide usage data, though the focus on 'quotas' is somewhat distinctive.

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 by mentioning 'admin only' for the user_id parameter, suggesting a context where administrative privileges are required. However, it doesn't provide explicit guidance on when to use this tool versus alternatives like 'get_range_metrics' or 'list_users,' nor does it specify prerequisites or exclusions beyond the admin note.

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