ga4_create_audience

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

No annotations are provided, so the description must fully disclose behavioral traits. It only mentions the write operation and dependencies, but fails to describe success/failure behavior, idempotency, permissions, or return value. This is insufficient for a write tool.

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 at two sentences, with no wasted words. The front-loaded '[GA4 WRITE]' immediately signals the operation type. Every sentence serves a purpose.

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 6 parameters, nested objects, no output schema, and no annotations, the description is insufficiently complete. It lacks details on return values, error scenarios, default behavior, and does not explain the audience creation process or constraints beyond the minimal requirements.

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%, with 3 out of 6 parameters lacking descriptions (description, displayName, membershipDurationDays). The tool description adds value for the body parameter by specifying filterClauses, but offers no additional meaning for the undocumented parameters. Baseline 3 is appropriate.

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 verb 'Create' and the resource 'audience', and the prefix '[GA4 WRITE]' indicates the operation type. It is distinct from sibling tools like ga4_update_audience and ga4_archive_audience, though it doesn't explicitly differentiate from them.

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 some guidelines such as requiring GA4_MCP_ENABLE_WRITES=true and confirm=true, and instructing to pass filterClauses via body. However, it does not specify when to use this tool vs alternatives (e.g., update) or any prerequisites beyond property ID.

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