create_project_milestone

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

Annotations already cover readOnly, openWorld, idempotent, and destructive hints, so the description does not need to repeat those. It adds a useful prerequisite (milestones enabled, project allowed) but does not explain what happens if the condition fails or how existing milestones are handled.

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 entire description is one concise, front-loaded sentence with no filler. It states the action and the key precondition without redundant wording.

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?

Despite a simple tool shape and an output schema, the description omits essential invocation details such as deadline format, the meaning of the required fields, and failure behavior when milestones are disabled. An agent would need to infer too much from parameter names alone.

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%, and the description provides no parameter-level meaning. It does not explain that project_id identifies the target project, name is the milestone title, or deadline is an optional date. The schema only gives type and title, which is insufficient for confident invocation.

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 uses a specific verb and resource ('Create a milestone') and adds a meaningful scope condition ('when milestones are enabled on the allowed project'). It clearly distinguishes this creation tool from sibling tools like update_project_milestone and list_project_milestones.

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 the correct usage context: use it only for allowed projects and only when milestones are enabled. It does not explicitly mention alternatives or when-not-to-use scenarios, but the condition gives clear contextual guidance.

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