Ludus FastMCP

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

No annotations are provided, so the description must fully disclose behavioral traits. It states the tool creates a pipeline, implying a write operation, but lacks details on permissions (beyond 'admin only' for user_id), side effects, error handling, or what 'Pipeline creation result' entails. This is inadequate for a tool that likely modifies system state, leaving the agent with significant uncertainty about its behavior.

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 well-structured and concise, with a clear purpose statement followed by 'Args:' and 'Returns:' sections. Each sentence adds value, such as clarifying parameter roles. It avoids redundancy, though the 'admin only' note could be integrated more smoothly. Overall, it is efficient and easy to parse.

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 creating a deployment pipeline with 4 parameters (2 required), 0% schema description coverage, no annotations, and an output schema (which helps but isn't detailed in the description), the description is incomplete. It lacks critical information on behavioral aspects, detailed parameter usage, and how this tool fits among siblings, making it insufficient for reliable agent use.

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 description adds some semantic context for parameters: it explains that 'stages' are 'List of pipeline stages with configurations' and 'triggers' are 'Optional trigger conditions (schedule, webhook, etc.)'. However, with 0% schema description coverage and 4 parameters, this only partially compensates. Key details like the structure of stages or specific trigger types are not elaborated, leaving gaps in understanding.

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: 'Create a deployment pipeline with multiple stages.' It specifies the verb ('Create') and resource ('deployment pipeline'), and adds useful detail about 'multiple stages.' However, it does not explicitly differentiate this tool from sibling tools like 'deploy_range' or 'deploy_scenario,' which might involve deployment processes but are not specifically for pipeline creation.

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 mentions 'admin only' for the optional user_id parameter, but this is a parameter detail, not usage context. With many sibling tools related to deployment and ranges, there is no indication of when this tool is appropriate, such as for setting up automated workflows versus one-time deployments.

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