create_subtask

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

Annotations already indicate this is a write operation (readOnlyHint=false) and not idempotent. The description adds useful behavioral context beyond the annotations by stating the subtask inherits the parent's project and that the parent must be verified/allowed, which informs preconditions and likely validation 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 entire description is one focused, front-loaded sentence. Every phrase earns its place, and the key constraint about allowed projects and verified parent tasks is stated directly without unnecessary 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?

For the core purpose, the description is adequate: it identifies the action, the parent relationship, and the project constraint. However, given nine parameters and no schema-level descriptions, important invocation details like date formats, priority semantics, and valid ID sources are left unspecified. The output schema reduces some burden, but there are clear gaps.

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%, and the description only clarifies parent_task_id's role implicitly. The nine parameters, including required `name` and various optional fields, receive no semantic explanation. Property titles like 'Name' and 'Deadline' provide some surface meaning, but the description does not compensate for the coverage gap.

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 states a specific action ('Create') and resource ('subtask'), and adds a valuable distinguishing constraint: it must be placed in the same allowed project as its verified parent task. This clearly separates it from sibling tools like create_task or create_project.

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 when to use the tool: when a subtask needs to be created under an existing, verified parent task. However, it does not explicitly say when not to use it or mention alternatives such as create_task for top-level tasks, leaving some routing to inference.

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