ga4_create_display_video_360_advertiser_link

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

With no annotations, the description must disclose behavior. It indicates it's a write operation and requires confirmation, but does not mention any side effects, error conditions, idempotency, or what happens after creation. The behavioral transparency is minimal.

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 concise: one sentence with a requirement note. It is front-loaded with [GA4 WRITE] to indicate action type. No extraneous words. While very short, it covers the essential action without redundancy.

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 4 parameters, including a nested 'body' object, and no output schema, the description is incomplete. It fails to explain the purpose of the advertiser link, how to construct the body, or what to expect as a response. More context is needed for effective usage.

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 coverage is 100%, so baseline is 3. The description adds no extra meaning to parameters like 'body' or 'advertiserId'. It doesn't explain how to use the nested body object or any relationships between parameters. The schema descriptions are minimal but exist.

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 resource 'Display & Video 360 advertiser link', which is specific. The name and description align well. However, it could further clarify what an advertiser link entails, but it's sufficient for basic understanding.

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 only mentions prerequisites (GA4_MCP_ENABLE_WRITES=true and confirm=true) but gives no guidance on when to use this tool versus alternatives like update or delete, or other GA4 create tools. No context on appropriate scenarios or exclusions.

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