create_subtask

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

No annotations are provided, so the description carries the full burden of disclosing behavioral traits. It only states that a subtask is created, with no mention of side effects, permissions, prerequisites, or return behavior. While 'create' implies mutation, it adds no further context about what happens after creation.

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, tightly worded sentence: 'Create a subtask (checklist item) on a task.' It is front-loaded with the action, includes a clarifying parenthetical for the resource type, and contains no redundant words.

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?

Given the tool's simplicity (2 parameters, no output schema, no annotations), the description is mostly complete. It clearly conveys the purpose and scope, and the schema covers parameter details. However, it omits any mention of return values or behavioral side effects, which would be helpful in the absence of annotations.

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?

The input schema covers both parameters (task_id and title) with descriptions, achieving 100% schema description coverage. The tool description adds no additional parameter semantics beyond what the schema already provides, so it sits at the baseline of 3.

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 identifies the action ('Create') and the resource ('subtask (checklist item)') and specifies the scope ('on a task'). This distinguishes it from sibling tools like create_task, which creates top-level tasks, and create_comment, which adds comments.

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 provides no explicit guidance on when to use this tool versus alternatives. It does not mention exclusions, prerequisites, or alternative tools such as create_task for top-level tasks or add_tag_to_task for tagging. The usage context is only implied by the name and description.

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