ga4_list_custom_dimensions

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

With no annotations, the description bears full responsibility for disclosing behavioral traits. It implies a read-only operation but provides no details on authentication, rate limits, or the effect of missing the optional propertyId parameter. The lack of transparency is a gap.

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 very concise with a single sentence, but it is too brief to be fully informative. It does not waste words, but it sacrifices clarity and completeness for brevity. A bit more detail would improve it without being verbose.

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 low complexity, missing output schema, and no annotations, the description is insufficient. It does not mention the return format, pagination, or the behavior when propertyId is omitted. The tool's purpose is clear, but it lacks necessary context 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?

Schema description coverage is 0%, and the description does not explain the 'propertyId' parameter. Even though the parameter name is somewhat self-explanatory, the description should clarify its role, format, or default behavior. This is a significant omission.

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 'list custom dimensions' and the resource 'property' within GA4 Admin. It distinguishes from sibling tools like 'ga4_create_custom_dimension' and 'ga4_list_data_streams' by specifying the resource type. However, it could be more precise about the scope (e.g., listing all custom dimensions vs. per property).

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 no guidance on when to use this tool versus alternatives. It does not mention prerequisites, contexts, or exclusions. The sibling tools include related actions like creation, but no comparison is given.

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