custom_reports_create

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

No annotations are provided. The description correctly discloses async behavior and the polling mechanism, which is essential. However, it omits details on side effects, permissions, rate limits, or error scenarios.

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 extremely concise, using two sentences to convey purpose and output. Every word adds value, with no redundancy or fluff.

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 tool has 7 parameters, nested objects, and no output schema, the description is insufficient. It fails to explain parameter usage, defaults, or return value structure, leaving significant gaps for a complex creation 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?

The description does not add any parameter-specific meaning beyond what the input schema already provides. Although schema coverage is 57%, the description lacks details on required parameters like name or how granularity and dateRange interact, leaving 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 creates an Impression Share report, specifies it is asynchronous, and explains the polling pattern using custom_reports_get. It distinctly identifies the resource and action, differentiating it from sibling report tools.

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 no guidance on when to use this tool versus alternatives like reports_adgroups or other report creation tools. It does not mention prerequisites, conditions, or exclusions.

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