ga4_create_conversion_event

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

With no annotations provided, the description carries the burden of behavioral disclosure. It adds non-obvious behaviors: the confirm flag must be true to actually create, and the event must already be firing or GA4 rejects it. It also surfaces the dependency on the Ads link. It does not fully cover permissions or idempotency, but the most operationally critical behaviors are disclosed.

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 compact and front-loaded, with a functional first sentence followed by a tight Args list containing precise guidance. No filler or redundant restatement of the tool name or schema.

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?

For a create operation with an output schema, the description covers the core prerequisites, confirmation behavior, and the Ads link dependency. The main gap is the undocumented property_id parameterhol, but since it is optional with a default of nullressing, the description is still largely complete for correct invocation.

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 schema has 0% description coverage, so the description must compensate. It does this well for event_name (exact dataLayer/gtag name, examples, rejection condition) and confirm (must be true). However, property_id is present in the schema but completely absent from the description, leaving one parameter under-documented.

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 uses a specific verb ('Mark an event as a conversion') with the resource named (GA4 conversion/Key event) and explains the downstream purpose (feeds Ads bidding and Conversions column). It clearly distinguishes this tool from related GA4 tools like ga4_list_conversion_events and ga4_delete_conversion_event, and even references ga4_create_google_ads_link as a dependency.

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 gives a clear precondition: the event must already be firing at least once, otherwise GA4 rejects it. It also states the GA4↔Ads link requirement and points to the specific sibling tool needed to establish that link. It does not explicitly list exclusions or when to prefer an alternative, but the context is actionable.

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