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 of behavioral disclosure. It mentions actions like 'configure' and 'create_issue' but doesn't describe behavioral traits such as required permissions, rate limits, side effects, or error handling. The description lacks critical details needed for safe and effective tool invocation, making it insufficient for a mutation-heavy 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?

The description is structured with a brief purpose statement followed by 'Args' and 'Returns' sections, making it easy to scan. It's appropriately sized with no redundant information. However, the 'Returns' section is vague ('Jira integration result'), which slightly reduces efficiency, but overall it's well-organized and concise.

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 (6 parameters, mutation actions, no annotations) and the presence of an output schema, the description is incomplete. It doesn't provide enough context for safe use, such as authentication requirements, error scenarios, or output details. The output schema existence means return values don't need explanation, but the description still lacks essential behavioral and parametric guidance for a tool with multiple actions and parameters.

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 lists parameters with brief notes (e.g., 'Action to perform', 'Jira instance URL'), but these add minimal semantic value beyond the parameter names. For example, it doesn't explain the format of 'jira_url' or the meaning of 'admin only' for 'user_id'. With 6 parameters and no schema descriptions, the description fails to adequately clarify parameter meanings and usage.

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 states 'Integrate with Jira for issue tracking,' which provides a general purpose but is vague about the specific actions. It lists multiple actions (configure, create_issue, update_issue, link_deployment) but doesn't clearly distinguish this tool from potential siblings, as no Jira-specific siblings are mentioned in the list. The purpose is understandable but lacks specificity and differentiation.

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 no guidance on when to use this tool versus alternatives. It lists actions but doesn't specify contexts, prerequisites, or exclusions. For example, it doesn't indicate when to choose this over other integration tools or how it fits into workflows, leaving the agent with minimal usage direction.

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