search_ads_library

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

Discloses important behavioral nuance: only ads in political/housing/employment/credit categories return full metadata, others return lighter data. No annotations exist, so description compensates well.

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?

Two concise paragraphs with front-loaded purpose, no wasted words. Every sentence adds value.

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?

Covers main functionality and limitations, but does not address pagination details or publisher_platforms filtering. Adequate for a search tool with no output schema.

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?

Description adds context beyond schema by explaining search logic (OR between search_terms and search_page_ids), default country, and returned fields. Schema coverage is 67%, so description helps fill gaps.

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 searches Meta's public Ad Library for competitive research, with specific verbs and resource. It distinguishes from sibling tools focused on account-level ads management.

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?

Implies usage for competitive research but does not explicitly guide when to use this vs alternatives like get_ad, list_ads, or when not to use it. No exclusions or alternative tool mentions.

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