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

The description adds the useful detail that the return is 'compact' and lists the response fields, but it fails to disclose whether project_id filters the results or if all milestones across all projects are returned. With readOnlyHint=true already covering safety, the description could add more context about scope and default 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 a single, tight phrase that conveys the core purpose and response format with no filler. It front-loads the key information and every word contributes value.

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?

For a simple list tool with one optional parameter and no output schema, the description covers the response shape but omits parameter semantics and scope clarification. The lack of any mention of project_id's role makes it partially incomplete for an agent to invoke correctly.

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 coverage is 0% and the description does not mention the project_id parameter at all. It only describes response fields, not how the parameter influences the result. This leaves the agent to guess whether project_id is required, optional, or what values it accepts.

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 returns all milestones in a compact format, listing the specific fields included (id, name, weeks, order, done/total). This distinguishes it from singular tools like get_milestone and mutation tools like propose_milestone, matching the list_* sibling pattern.

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 usage for retrieving an overview of all milestones, but it does not explicitly state when to use this tool versus alternatives like get_milestone for a single milestone or report_milestone_progress for progress updates. There is no mention of when not to use it.

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