ga4_account_summaries_list

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

Declares 'Read-only' and mentions accessibility to the authenticated user, adding behavioral context beyond the schema. With no annotations, the description carries the transparency burden well, though it could mention potential pagination behavior (though schema covers it).

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 sentences, no wasted words. The first sentence front-loads the purpose, followed by a concise explanation of content and use case.

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 two optional parameters and no output schema, the description fully covers what the tool does, what it returns (account + property summaries with ID and display name), and its role in the workflow. No gaps remain.

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%, so the schema already fully documents the two parameters. The description adds no additional parameter-specific semantics, earning the baseline score of 3.

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?

Clearly states 'List GA4 account summaries' with specific verb and resource. Explains what each summary contains (account plus lightweight list of property summaries with ID and display name). Distinguishes itself from sibling tools like ga4_properties_list by being the best starting point for discovery.

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?

Explicitly calls itself the 'Best starting point to discover available GA4 accounts and properties,' providing clear use context. However, it does not explicitly mention when not to use it or name alternative tools, so a perfect 5 is not warranted.

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