todo_check_checklist_item

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

With no annotations provided, the description carries the full burden and largely drops it. 'Mark' implies a mutation on an existing item, but nothing is said about whether the call is idempotent, whether it requires write permission on the list, or what happens when checked is omitted (the schema defaults it to true, which silently forces a check).

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 front-loaded sentence with no padding, but its brevity is driven by under-specification rather than efficiency. The checked/unchecked framing does at least lead with the state transition.

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 four-parameter mutation with no annotations, no output schema, and no parameter documentation, this description leaves the agent without the information it needs. It does not identify what a checklist item is nested under or what the call returns.

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%, so the four parameters are documented only by their bare titles (list_id, task_id, item_id, checked). The description clarifies only the semantics of 'checked' in the loosest way and adds nothing about the three ID parameters or their relationship (a checklist item lives under a task inside a list).

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 ('Mark') and resource ('checklist item') plus the state transition being applied (checked/unchecked), which is enough to distinguish it from todo_add_checklist_item and todo_delete_checklist_item. It does not explicitly name siblings, but the resource-level specificity carries it.

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?

No guidance on when to use this versus todo_add_checklist_item, todo_delete_checklist_item, or todo_list_checklist_items. There is also no statement of prerequisites, such as the item having to already exist on the task.

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