List GA4 properties

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

Annotations already declare readOnlyHint=true, idempotentHint=true, and destructiveHint=false, so the description doesn't need to repeat those. It adds valuable context by noting the prerequisite that the Analytics Admin API must be enabled and that the listing is scoped to the authorized account, which goes beyond the annotations.

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 concise sentences: the first states the core action and resource, the second adds a necessary prerequisite. No filler or redundancy; every word earns its place.

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?

For a simple list tool with no parameters and safety annotations, the description is sufficiently complete. It specifies what is listed and the API requirement. It doesn't mention output format or pagination, but these are minor for a tool of this simplicity.

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?

There are zero parameters, so the schema has full coverage and no parameter documentation is needed. The baseline for 0 params is 4, and the description doesn't need to add anything about parameters since none 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 states a specific verb ('List'), a precise resource ('Google Analytics accounts and GA4 properties'), and the scope ('the authorized account can access'). It is unambiguous and clearly differentiates from sibling tools like ga_run_report, which run reports rather than list resources.

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 implies its use for discovery of accessible accounts/properties, but it does not explicitly contrast it with alternatives or state when not to use it. The context is clear enough for an agent to infer the purpose, but no explicit routing guidance is given.

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