label_thread

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

No annotations are provided, so the description carries the full behavioral burden. It only says labels can be added or removed, but does not disclose whether label names or IDs are expected, whether the operation is idempotent, what happens if a label does not exist, or what mutation side effects occur. For a write tool this is a significant gap.

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 very short and readable, with minimal filler. However, the leading '(unconfigured)' marker adds noise, and the brevity comes at the cost of useful behavioral and parameter context. It is concise but not optimally structured for agent decision-making.

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?

With no annotations, no output schema, and 0% schema parameter coverage, the description alone must make the tool safely invokable. It only states the high-level action, omitting return value behavior, prerequisites, error conditions, and parameter semantics. This is insufficient for a 4-parameter mutation tool.

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 schema supplies only titles and types. The description loosely maps to 'add' and 'remove' parameters, but it does not clarify the expected value format, whether these are label IDs or names, or how account and thread_id relate to the operation. The description does not compensate for the schema's lack of parameter documentation.

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 clear verb and resource: 'Add or remove labels on a thread.' This is unambiguous enough to distinguish it from sibling read-only tools like get_thread and list_labels, though it does not explicitly compare itself to any sibling.

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?

There is no guidance about when to use this tool versus alternatives, no mention of prerequisites like needing existing labels or a valid thread, and no exclusionary context. The only usage signal is implied by the tool name and one-line description.

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