ga4_create_audience

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

No annotations are provided, so the description carries the burden. It discloses that the tool is a write operation and requires confirmation, but does not mention idempotency, side effects, or error behavior. Adequate but not thorough.

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 sentences, front-loaded with purpose and body guidance, then prerequisites. No wasted words.

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 complexity of creating an audience with nested filterClauses, the description provides essential context (write, confirmation, body reference). However, it lacks details on return format or body structure specifics, and some parameters remain underexplained.

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?

Schema description coverage is 50%. The description adds value for the 'body' parameter by referencing the Admin API shape, but other parameters (property, description, displayName, membershipDurationDays) are not elaborated beyond the schema.

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 action 'Create an audience' with a '[GA4 WRITE]' prefix indicating it's a write operation. This distinguishes it from sibling tools like ga4_archive_audience and ga4_update_audience.

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 specific usage guidance: body should include filterClauses per Admin API shape, and prerequisites (GA4_MCP_ENABLE_WRITES=true and confirm=true) are stated. However, it does not explicitly exclude when not to use this tool vs alternatives.

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