create_milestone

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

The description discloses only that the tool creates a milestone, which implies a write operation, but it does not mention permissions, idempotency, error conditions, or side effects. With no annotations to supplement, this is insufficient for an agent to understand behavioral implications.

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 a single, concise sentence that communicates the essential purpose without waste. However, it could be slightly more informative without sacrificing conciseness, e.g., mentioning that it requires an existing project.

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?

With 5 parameters and no output schema or annotations, the description is too minimal. It does not explain return values (e.g., the created milestone object), required prerequisites, or behavior in edge cases (e.g., duplicate title). More context is needed for a complete understanding.

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 input schema describes all 5 parameters with individual descriptions (100% coverage), so the baseline is 3. The tool description does not add any additional meaning beyond the schema, so no bonus is given.

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 verb ('Create') and resource ('milestone') within a GitLab project, making the purpose unambiguous. However, it does not distinguish from sibling tools like update_milestone or list_milestones, preventing a perfect score.

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?

No guidance is provided on when to use this tool versus alternatives (e.g., update_milestone). The description lacks any context about prerequisites or scenarios where this tool is appropriate.

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