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

Annotations already declare readOnlyHint=true, openWorldHint=true and destructiveHint=false, so safety is covered. The description adds value beyond them: it discloses the ordering (Gantt-chart order) and the authentication requirement (Cotlet API key with app access), which an agent needs in order to succeed.

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 purpose is front-loaded, but the returned fields (start/end dates, dependencies, percent complete) are stated twice ('Gantt schedule tasks with…' and 'Each task has…'), which is redundant padding an agent doesn't need repeated.

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 no output schema, the description correctly carries the burden of describing the returned task fields and ordering, and it notes the auth requirement and the sibling update call. Only minor gaps (e.g., pagination or how an empty schedule is represented) remain.

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?

There is a single parameter with 100% schema coverage, and the schema already documents project_id with its source (list_projects). The description adds no further parameter semantics, so the baseline of 3 is appropriate.

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?

States a clear resource and scope: it returns the project schedule's tasks in Gantt-chart order, and it names the sibling update_schedule_task for follow-up. The purpose is unambiguous, though the description spends more effort on return shape than on a crisp verb statement.

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?

It implies the follow-up workflow by saying 'Use the task_id with update_schedule_task,' which is a genuine usage cue. However, it gives no when-to-use vs alternatives guidance or prerequisites beyond the auth note, so usage is only implied.

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