create_milestone

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

No annotations are provided, so the description carries the full behavioral burden, and it supplies almost none of it: it doesn't say what permissions are required, whether duplicate titles are rejected, whether the milestone is immediately active, or what is returned. "With due dates and roadmap scope" gestures at fields, not behavior. For a mutation tool with zero annotation coverage this is a real gap.

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?

A single tight sentence with no filler and the verb front-loaded. It is efficient, though its brevity here reflects under-specification rather than disciplined concision, which caps it below 5.

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?

The schema fully documents all five parameters and two required fields, so an agent can construct a valid call. But with no annotations and no output schema, nothing tells the agent about failure modes, permission requirements, or the returned milestone — the description should have covered that ground.

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 all five parameters (including date formats and project_id namespace handling) are already fully documented in the schema. The description's mention of "due dates and roadmap scope" loosely maps to due_date/start_date and description but adds no format or constraint detail beyond the schema. Baseline 3 applies.

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 names a specific verb ("Create") and resource ("project milestone"), so the agent can distinguish it from list_milestones, get_milestone, and update_milestone in the sibling list. However, it never explicitly frames itself as the write counterpart to those read/update siblings, so differentiation is inferable rather than stated.

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 indication of when to use this tool versus the sibling create/update tools, no prerequisites (project must exist, permission level needed), and no exclusions. The agent is left to infer that this is the creation path from the verb alone.

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