modify_group

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

With no annotations, the description carries the behavioral burden. It usefully discloses that light_ids is a 'Complete new list', signaling replacement semantics. However, it does not clarify how null values behave (e.g., whether null means 'leave unchanged' or 'clear'), nor does it mention permissions 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?

The description is short, front-loaded with the purpose, and the Args block is compact with no filler. Every sentence contributes useful information.

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?

The description covers the core purpose and all parameters, and an output schema exists to document returns. However, it lacks null-value semantics and usage guidance relative to sibling tools, so it is not fully self-sufficient for an agent deciding between modify_group and set_group_action.

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 compensates by documenting all three parameters in the Args block. The 'Complete new list of light IDs' detail adds important semantics beyond the bare schema, though null behavior is still underspecified.

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 states the tool's actions: 'Rename a group or change its member lights.' This identifies the resource (group) and distinguishes it from lifecycle tools like create_group/delete_group, though it does not explicitly differentiate it from set_group_action.

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 renaming or changing group membership) but provides no explicit when/when-not guidance or alternatives. It does not mention prerequisites or how this differs from set_group_action or create_group.

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