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

Adds context beyond the annotations: the administrator-only permission requirement and the fact that the created project starts empty and needs a task before time entry works. 'Creates a new project every call' reinforces the non-idempotent behavior the annotations already hint at, and nothing here conflicts with openWorldHint or destructiveHint=false.

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?

Four tight sentences, front-loaded with the 'WRITE:' marker and the operation, then permission, then post-state workflow constraint. Every sentence carries actionable information with no filler.

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 7-parameter mutation tool with no output schema, the description covers permissions, non-idempotency, and the follow-up task requirement well. It does not indicate what the call returns (e.g., the new project id needed to chain into tick_create_task), which is the one gap given the absence of an output schema.

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 seven parameters (name, client_id, budget, billable, owner_id, recurring, notifications) are already documented in the schema. The description contributes no additional parameter meaning beyond referencing tick_list_clients indirectly via the schema, so the baseline of 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?

States a specific verb and resource ('create a new project') plus the underlying endpoint (POST /projects.json), and it explicitly delimits scope by noting the new project contains no tasks, routing that work to tick_create_task. An agent can distinguish this from the create/list/get siblings without opening a schema.

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?

Gives real preconditions ('Tick administrators only') and a workflow rule (create a task with tick_create_task before time can be logged), which tells the agent both who may call it and what must follow. It does not name an alternative for checking whether a project already exists (e.g., tick_list_projects), so it stops short of full when-not guidance.

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