add_label_to_card

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

With no annotations, the description carries full responsibility for disclosing behavioral traits, but it provides none. It does not state whether the operation is idempotent, what happens if the label already exists, required permissions, or any side effects. The description is purely declarative with zero transparency.

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, clear sentence with no unnecessary words. It is front-loaded and efficient, conveying the core purpose concisely. While it lacks detail, the form is highly concise and well-structured.

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 is inadequate for a mutating tool with no annotations and no output schema. It does not cover necessary context such as possible errors, idempotency, or how it relates to sibling tools. For an AI agent, this is insufficient to understand the full behavioral contract, even though the tool itself is simple.

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%, so the description must compensate by explaining the parameters. It does not mention 'card_id' or 'label_id' at all, leaving the agent to infer their semantics solely from names. This adds no meaning beyond the raw schema.

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 function: 'Add a label to a card.' It uses a specific verb ('Add') and resources ('label', 'card'), and it naturally distinguishes itself from sibling tools like 'remove_label_from_card' and 'create_label'.

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 versus alternatives. It does not mention prerequisites, exclusions, or context such as needing to create the label first or ensuring the card exists. The description only states the action without any situational advice.

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