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

The description adds real value beyond annotations by stating "Commits immediately," warning the agent there is no draft or confirm step. However, for a mutation tool it leaves the most important behavioral question unanswered: whether the supplied steps append to existing steps or replace them, and what happens on an invalid task_id.

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?

Two short sentences, front-loaded with the operation and followed by the commit behavior — no filler. It is arguably so terse that brevity shades into under-specification, which is why it is not a 5.

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?

This is a non-read-only mutation with a nested-object parameter, incomplete schema descriptions, and no output schema to explain results. Given that complexity, the definition is missing append-vs-replace semantics and any indication of what is returned or how failures surface.

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 only 33%, so the description must carry weight, and the qualifier "micro-action" does add semantic meaning to the undocumented `steps` array (short actionable items rather than prose). It still says nothing about step string format, count limits, or the meaning of `task_id`, so it only partially compensates 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?

"Add micro-action steps to an existing task" gives a specific verb (add steps) and resource (an existing task), which distinguishes it from create_task and complete_micro_action in the sibling list. It does not explicitly name any sibling, so differentiation is inferred rather than stated.

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 phrase "existing task" implies a prerequisite (the task must already exist) but there is no explicit when-to-use guidance, no when-not guidance, and no pointer to alternatives such as update_task if the steps are wrong or need editing. The agent must infer the usage context entirely.

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