gtag_config_create

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

No annotations are provided, so the description carries the full burden. It indicates this is a write operation (via [WRITE]) and requires confirmation. However, it does not disclose potential side effects (e.g., overwrite behavior on conflict) or output details. For a create operation, this is acceptable but not exhaustive.

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 two short sentences, front-loaded with the verb and constraints. Every sentence provides essential information without excess. It is concise and well-structured.

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 CRUD nature of the tool, the description covers the essential purpose, prerequisites, and parameter usage. No output schema exists, but for a create tool, the return value is typically the created resource, which is inferred. The description is adequate for the context, though it could mention validation or error scenarios.

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 100%, and each parameter has a description in the schema. The description adds only a minor reinforcement: 'Pass the full resource as a JSON string in bodyJson.' With full schema coverage, baseline is 3, and the description does not significantly enhance parameter understanding 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 begins with '[WRITE] Create a new GTM gtag config', providing a specific verb and resource. It clearly distinguishes from sibling tools like gtag_config_get, gtag_config_list, gtag_config_delete, and gtag_config_update, which are other CRUD operations for the same resource.

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 explicitly states the prerequisites: 'Requires GTM_MCP_ENABLE_WRITES=true and confirm=true.' This guides the agent on when the tool can be invoked. However, it does not differentiate between creating a new config versus updating an existing one, though the name implies creation.

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