Create Ad Label

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

Annotations are all false, placing the burden on the description. The description omits the response_format parameter (present in schema) and does not describe what the tool returns (e.g., label ID). It provides minimal behavioral context beyond 'creates a label.'

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 concise, but it is inconsistent: it lists two parameters in a non-standard format while the schema has three. This omission and format choice detract from clarity and completeness.

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?

Given the simple nature of a create tool, the description is insufficiently complete. It does not mention output format, permissions, or the fact that labels are used to organize ad objects. The response behavior is completely undocumented. For a tool with no output schema and sparse annotations, more context is needed.

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?

With only 33% schema description coverage, the description adds value by briefly defining ad_account_id as 'Ad account ID' and name as 'Label name.' However, it fails to mention the response_format parameter, which has a schema description. Overall, it compensates for the schema gaps to a reasonable degree.

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 verb 'Creates' and the resource 'label for organizing ads, ad sets, or campaigns,' distinguishing it from sibling tools like meta_list_ad_labels. The purpose is specific and unambiguous.

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 on when to use this tool versus alternatives. The description lacks context about prerequisites, typical use cases, or distinctions from other create tools. It simply states the function without any contextual recommendations.

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