color_assign_to_group

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

With no annotations, the description carries the full burden of behavioral disclosure. It does not mention side effects such as whether an existing group membership is overwritten, whether the group must already exist, or which timeline is targeted (implied to be the current one). The word 'assign' implies mutation, but no details are given.

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, front-loaded sentence with zero waste. It efficiently communicates the core purpose without unnecessary elaboration.

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?

While the schema documents parameters and an output schema exists, the tool is a mutating operation with no annotations. Missing context includes which timeline is affected (current timeline is implied but not stated), whether the group must exist, and the exact behavior on reassignment. The description is too sparse for an operation with side effects.

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 has 100% coverage with clear descriptions for all four parameters (group_id, item_name, track_type, track_index). The description adds no additional parameter meaning beyond the schema, so the baseline score of 3 applies.

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 'Assign a timeline item to a color group' clearly states the action (assign), the object (timeline item), and the target (color group). It distinguishes itself from sibling tools like color_create_group (creation) and color_remove_from_group (removal).

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?

No guidance is provided on when to use this tool, prerequisites (e.g., the color group must exist and its ID obtained via color_get_group_list), or how it differs from alternatives like item_set_color. The description only states the action with no contextual hints.

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