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

Annotations already declare readOnlyHint, openWorldHint, idempotentHint, and destructiveHint false. The description adds value beyond annotations by stating the tool wraps a public JSON file and requires no authentication, which clarifies its open and safe nature.

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 two sentences: the first explains what the tool does, the second gives usage scenarios. Every word carries weight. It is appropriately concise and front-loaded.

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 no parameters, no output schema, and simple nature, the description completely covers the tool's purpose, contents, and usage context. It lists the manifest contents (creative formats, payout rails, etc.) and notes public access.

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 no parameters and schema description coverage is 100%. Per rubric, no parameters set baseline at 4. The description adds no parameter info as none exist, which is acceptable.

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 returns the platform-wide embedder network manifest, listing specific contents (creative formats, payout rails, etc.). It distinguishes from the sibling tool get_embedder_manifest by emphasizing 'platform-wide' and 'DSP/SSP onboarding bundle'.

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?

The description provides two explicit use cases: evaluating whether to wire storyflo into a surface and when a DSP partner needs the canonical integration shape. It also notes the tool is public with no auth required. However, it does not explicitly exclude alternatives, though the use cases are well-targeted.

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