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

With no annotations, the description carries the burden and it adds a meaningful invariant: it refuses to place a group inside its own descendants. It also signals this is a mutating operation, though it does not discuss other failure modes or side effects.

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 with no filler. The primary action is front-loaded and the important cycle-safety caveat is stated immediately after.

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 low-complexity mutation with fully documented parameters, the description covers the operation, the root-detach option, and the key safety guard. It does not need to explain return values because there is no output schema, though it omits explicit alternative-selection guidance.

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 the schema already documents all four parameters. The description adds little beyond the schema, only echoing the null-to-root behavior encoded in parentGroupId.

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 precise operation: move an element into a group or detach it to root. The resource (element/group hierarchy) is clear and the behavior is distinct from related sibling tools like group_layers or reorder_layer.

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 use when reparenting an element, but it does not explicitly contrast with siblings such as move_layer, reorder_layer, group_layers, or ungroup_layers, nor does it state when not to use it.

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