addMilestone

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

With no annotations provided, the description carries the full burden of behavioral disclosure. It only implies mutation through 'Creates' but does not disclose write permissions, whether creation is destructive to existing data, idempotency, parent milestone constraints, or what the response contains. This is a significant gap for a mutation 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 short but includes a full Japanese duplicate of the English sentence that adds no new information for an AI agent. While front-loaded, the bilingual repetition wastes tokens and makes it less concise than it appears.

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?

This is a create tool with 7 parameters, no annotations, and no output schema, yet the description only provides the basic purpose. It lacks guidance on project prerequisites, parent milestone behavior, date format expectations, or return value shape, leaving the agent under-informed for correct invocation.

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 100%, so every parameter is already documented with clear meanings. The description adds no extra parameter semantics beyond the schema, which earns the baseline 3 per the rubric.

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 a specific verb and resource: 'Creates a new milestone in a TestRail project'. This clearly differentiates it from sibling tools like addCase or getMilestones by naming the milestone resource, though it does not explicitly contrast with any sibling.

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?

There is no guidance on when to use this tool versus alternatives. It does not mention that listing milestones should use getMilestones, nor does it state any preconditions such as requiring an existing project. The agent must infer usage entirely from the tool name and schema.

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